Wednesday, August 26, 2009

Why Car Racing Has Become A Popular Adventure Sport?

Car Racing

Now a days, car racing or Formula One is one of the most exciting sport and the drivers participating in it are amongst the highest paid sport personalities in the world. Formula One, Grand Prix, the most popular form of modern era car racing began in 1950s, but the roots of Formula One is far earlier, including such pre world war II legends as Italian Tazio Nuvolari and the great German teams, Auto Union and Mercedes Benz.

The first road races are believed to take place in France, in the 1890s. In the beginning the cars were upright and heavy, road were tarred sand or wood, and races were too long.

A 1200 km road race from Paris to Bordeaux race in 1899, at a speed of 19.9 mph is regarded as the 1st proper motor race. Over the years, German technology of car making companies such as Auto Union and Mercedes Benz started arranging car racing.


Below Car Racing info from Wikipedia (

Auto racing (also known as automobile racing, motor racing or car racing) is a motorsport involving racing cars. It is one of the world's most watched television sports.

Sports car racing is a form of circuit auto racing with automobiles that have two seats and enclosed wheels. They may be purpose-built or related to road-going sports cars.

A kind of hybrid between the purism of open-wheelers and the familiarity of touring car racing, this racing is often associated with the annual Le Mans 24 Hours endurance race. First run in 1923, it is one of the oldest motor races still in existence. Other classic but now defunct sports car races include the Italian classics the Targa Florio (1906 - 1977) and Mille Miglia (1927-1957), and the Mexican Carrera Panamericana. Most top class sports car races emphasise endurance (races are typically anywhere from 2.5 to 24 hours in length), reliability and strategy over pure speed. Longer races usually involve complex pit strategy and regular driver changes - sports car racing is seen more as a team sport than a gladiatorial individual sport and team managers like John Wyer, Tom Walkinshaw, driver-turned-constructor Henri Pescarolo, Peter Sauber and Reinhold Joest have become almost as famous as many of their drivers.


Why Do People Love To Go For Trekking?


Trekking is a method of taking a break from the daily routine through some good hard work. Trekking can be a wonderful and, at the same time, an exhausting experience. To go trekking, it requires some stamina and the spirit of adventure along with a light bag containing some food, a water bottle and a camera.

A typical trekking day starts easily at 6 in the morning. There is always a trekking guide who instructs his group about the direction to follow and precautions to be taken. The trekkers get to see beautiful landscape on their way. By the end of the day the trekkers are completely exhausted, but not at all stressed.


Below Trekking info from Wikipedia (

The word trek has entered the English language as one of few words derived from Afrikaans. It means a long, hard journey, and is derived from the Dutch trekken (meaning to pull or haul).

Hiking is an outdoor activity which consists of walking in natural environments, often on hiking trails. It is such a popular activity that there are numerous hiking organizations worldwide. The health benefits of different types of hiking have been confirmed in studies.[1] The word hiking is understood in all English-speaking countries, but there are differences in usage.

Why Elvis Presley Is Considered To Be Immortal?

Elvis Presley

The king of Rock-n-Roll, Elvis Presley was born in 1935. He rose from poverty to fame in 1950s. Elvis Presley was hugely popular with the girls wherever he performed.

Elvis Presley had a unique sound and style. He toured all over the United States to perform in various concerts. During 1960s he acted in a number of movies.

Elvis Presley gave up acting in 1969 and concentrated entirely on his music. His style of singing had a lot of variety.

Elvis Presley performed at around 1000 concerts and had sold over 1 billion music album across the world. He won over 100 gold 1 platinum awards for his albums in the U.S and is by far the most popular musician. That is how he had attained the status of ‘Immortal’.


Below Elvis Presley info from Wikipedia (

Elvis Aaron Presley a [1][4] (January 8, 1935 – August 16, 1977) was an American singer and actor. A cultural icon, he is commonly known simply as Elvis and is also sometimes referred to as The King of Rock 'n' Roll or The King.

Presley began his career in 1954 as one of the first performers of rockabilly, an uptempo fusion of country and rhythm and blues with a strong back beat. His novel versions of existing songs, mixing "black" and "white" sounds, made him popular—and controversial[5][6][7]—as did his uninhibited stage and television performances. Presley had a versatile voice[8] and he had unusually wide success encompassing many genres, including rock and roll, gospel, blues, country, ballads and pop. To date, he has been inducted into four music halls of fame.

In the 1960s, Presley made the majority of his 31 movies, most of which were poorly reviewed but financially successful musicals.[9] In 1968, he returned to live performances in a television special,[10] which led to a string of successful tours across the U.S., notably in Las Vegas, for the remainder of his career. In 1973, Presley staged the first global live concert via satellite (Aloha from Hawaii), reaching at least one billion viewers live and an additional 500 million on delay,[11][12] and it remains the most watched broadcast by an individual entertainer in television history.

Why Do People Believed In Witches?


A witch is considered to be a person having a great power and authority and this power is utilized or harming others. Usually a witch is a woman who rides about at night on a broomstick.

During earlier times people lived in ignorance and superstition thus the witch craft firmly rooted itself on the hearts of people.

Around 17th century both Roman and Catholics protestant began a witch hunt, in England professional witch finders were appointed to find these witches and hundreds of people were accused of witch craft. A male witch is known as wizard or warlock.

During early Christian times witches used to sell their souls to devil, a pagan God in return they used to get supernatural powers. Men cannot understand certain phenomena. Thus due to ignorance they believed in witch craft.


Below Witches info from Wikipedia (

A witch (from Old English wicce f. / wicca m., also compare hag) is a practitioner of witchcraft.

Witchcraft, in various historical, anthropological, religious and mythological contexts, is the use of certain kinds of supernatural or magical powers. Witchcraft can refer to the use of such powers in order to inflict harm or damage upon members of a community or their property. Other uses of the term distinguish between bad witchcraft and good witchcraft, the latter involving the use of these powers to heal someone from bad witchcraft. The concept of witchcraft is normally treated as a cultural ideology, a means of explaining human misfortune by blaming it either on a supernatural entity or a known person in the community.

Why Do Ostrich Eat Stones?


The ostrich is a strange bird. It eats stones because it is a greedy bird. It’s main food consists of plant, seeds and berries but in order to digest these, ostrich eats stones.

The ostrich is found mainly in Africa and is the biggest bird in the world. It weighs nearly 130kg. Since it has small wings it cannot fly, these wings only help to maintain the balance when it is running.

Ostrich has scanty hair on its heard and neck. The ostrich lays the largest eggs. Each egg measures 15 to 18 cms in length and 12 to 15 cm in diameter. It is considered to be the fastest running bird in the world.

It can travel 80 kms per hour and run approximately 1 km at a stretch.


Below Ostrich info from Wikipedia (

The Ostrich, Struthio camelus, is a large flightless bird native to Africa (and formerly the Middle East). It is the only living species of its family, Struthionidae and its genus, Struthio. Ostriches share the order Struthioniformes with the Emu, kiwis, and other ratites. It is distinctive in its appearance, with a long neck and legs and the ability to run at maximum speeds of about 45mph (72km/h, the top land speed of any bird).[3] The Ostrich is the largest living species of bird and lays the largest egg of any bird.

The diet of the Ostrich mainly consists of plant matter, though it also eats insects. It lives in nomadic groups which contain between five and fifty birds. When threatened, the Ostrich will either hide itself by lying flat against the ground, or will run away. If cornered, it can attack with a kick from its powerful legs. Mating patterns differ by geographical region, but territorial males fight for a harem of two to seven females.

The Ostrich is farmed around the world, particularly for its feathers, which are decorative and are also used for feather dusters. Its skin is used for leather and its meat marketed commercially.

Why Do People Dance?


People dance to celebrate man occasions like the birth of a baby, wedding, festivals, clubbing etc. There are different types of dance like tribal dance, folk dance, disco, ball dance, etc.

In Europe, people celebrate the beginning of summer season by dancing round the maypole.

This type of dance is done for fun where every one can join and have fun. During the 17th century the folk dances become quite popular. By 19th century ballroom dance got popularity which is still quite popular.

There is another type of dance performed exclusively for the audience which is known as ballet. It is a way by which people narrate a drama without words. It is similar to operas.


Below Dance info from Wikipedia (

Dance (from French danser, perhaps from Frankish) is a sport and art form that generally refers to movement of the body, usually rhythmic and to music,[1] used as a form of expression, social interaction or presented in a spiritual or performance setting.

Dance may also to regarded as a form of nonverbal communication between humans, and is also performed by other animals (bee dance, patterns of behaviour such as a mating dance). Gymnastics, figure skating and synchronized swimming are sports dance disciplines, while martial arts kata are often compared to dances. Motion in inanimate objects may also be described as dances (the leaves danced in the wind), and certain musical forms or genres.

Definitions of what constitutes dance are dependent on social, cultural, aesthetic, artistic and moral constraints and range from functional movement (such as folk dance) to virtuoso techniques such as ballet. Dance can be participatory, social or performed for an audience. It can also be ceremonial, competitive or erotic. Dance movements may be without significance in themselves, such as in ballet or European folk dance, or have a gestural vocabulary/symbolic system as in many Asian dances. Dance can embody or express ideas, emotions or tell a story.

Dancing has evolved many styles. Breakdancing and Krumping are related to the hip hop culture. African dance is interpretive. Ballet, Ballroom, Waltz, and Tango are classical styles of dance while Square and the Electric Slide are forms of step dances.

Why Do We Wear Shoes?


Footwear has a history that goes back many thousand years, and has long been an article of prestige. The earliest shoe is believed to have been made from grass held to foot with thongs, probably to protect the feet while walking on a rough surface.

In ancient times civilizations such as Egyptians, Chinese and Vikings used to wear shoes. There are many references of shoes in many folk tales and fairy tales. The type of shoes worn depended on the climate. In Warmer climate sandal is more popular.

Though, the requirement of fashion neglects the comfort factor. Specialized footwear for specific purpose of shoes has improved; people wear shoes to suit both comfort and fashion requirements.


Below Shoes info from Wikipedia (

A shoe is an item of footwear evolved at first to protect the human foot and later, additionally, as an item of decoration in itself. The foot contains more bones than any other single part of the body, and has evolved over hundreds of thousands of years in relation to vastly varied terrain and climatic conditions. Together with the proprioceptive system, it is what makes possible balance and ambulation.

The majority of people did not wear shoes until recent years; shoes were not worn by most of the world's population—largely because they could not afford them. Only with the advent of mass production, making available for the first time the cheap flip-flop-type sandal, for example, has shoe-wearing become predominant.

Why Do We Celebrate Easter?

Easter Bunny and Easter Egg

Easter is a ‘Christian Holiday’ and prior to 325 A.D it was not celebrated on fixed day. Rather, it was variously celebrated on different days of the week, including Friday, Saturday and Sunday. Easter celebrates the Resurrection of Jesus Christ on the third day of his crucifixion.

The origin of Easter dates back to the beginning of Christianity. Previously Easter was known as the Sunday of Pascha. The question of the date of Easter was solved in 325 A.D by the council of Nicaea. The council decided that Easter should fall on Sunday following the first full moon after vernal equinox. March 21 was made out to be the perfect date for spring equinox. Till then, the same date has been followed, to celebrate Easter.


Below Easter info from Wikipedia (

Easter (Greek: Πάσχα, Pascha) is the most important annual religious feast in the Christian liturgical year.[1] According to Christian scripture, Jesus was resurrected from the dead on the third day from his crucifixion. Christians celebrate this resurrection on Easter Day or Easter Sunday[2] (also Resurrection Day or Resurrection Sunday), two days after Good Friday and three days after Maundy Thursday. The chronology of his death and resurrection is variously interpreted to be between 26 and 36 AD. Easter also refers to the season of the church year called Eastertide or the Easter Season. Traditionally the Easter Season lasted for the forty days from Easter Day until Ascension Day but now officially lasts for the fifty days until Pentecost. The first week of the Easter Season is known as Easter Week or the Octave of Easter. Easter also marks the end of Lent, a season of fasting, prayer, and penance.

Easter is linked to the Jewish Passover not only for much of its symbolism but also for its position in the calendar.

Relatively newer elements such as the Easter Bunny and Easter egg hunts have become part of the holiday's modern celebrations, and those aspects are often celebrated by many Christians and non-Christians alike. There are also some Christian denominations who do not celebrate Easter.

Tuesday, August 25, 2009

Why Do We Celebrate Mother’s Day?

Mother's Day Cake

In the U.S Mother’s Day is celebrated on 2nd Sunday of May. It was first observed in Philadelphia in 1907. In England there was an annual observance called ‘The Mothering Sunday’. In the U.S in 1908 Ana Jarvis began a campaign to establish a national Mother’s Day.

She persuaded her mother’s church in Grafton, West Virginia to celebrate Mother’s Day on the death anniversary of her mother. Constant efforts were taken to get the 2nd Sunday of May recognized as official Mother’s Day.

Many other countries celebrate their own Mother’s Day at different times of the year.


Below Mother’s Day info from Wikipedia (

The modern Mother's Day holiday was created by Anna Jarvis in Grafton, West Virginia, as a day to honor mothers and motherhood; especially within the context of families, and family relationships.[1] It is now celebrated on various days in many parts of the world, some of which have a much older tradition than the modern holiday (e.g. dating to the 16th century in the UK). Father's Day is a corresponding holiday honoring fathers.

The holiday eventually became so commercialized that many, including its founder, Anna Jarvis, considered it a "Hallmark Holiday", i.e. one with an overwhelming commercial purpose. Anna ended up opposing the holiday she had helped to create.[

Why Chimpanzee Are Considered To Be A Special Type Of Monkeys?


Since chimpanzee is the most intelligent of all the monkeys, they are considered to be a special type of monkeys.

They belong to the highest order of mammals known as primates. They have no tail. They have thirteen paris of ribs. When they grow old their hair becomes grey and the skin turns dusky. They are mostly found in Central African forests.

Chimpanzee can easily be captured and kept in zoos. Chimpanzee are very emotional and have a language by which they communicate with each other.


Below Chimpanzee info from Wikipedia (

Chimpanzee, sometimes colloquially chimp, is the common name for the two extant species of ape in the genus Pan where the Congo River forms the boundary between the native habitat of the two species:[2]

    * Common Chimpanzee, Pan troglodytes: the better known chimpanzee lives primarily in West and Central Africa.
    * Bonobo, Pan paniscus: also known as the "Pygmy Chimpanzee or Bonzi Chimpanzee", this species is found in the forests of the Democratic Republic of the Congo.

Chimpanzees are members of the Hominidae family, along with gorillas, humans, and orangutans. Chimpanzee are thought to have split from human evolution about 6 million years ago and thus the two chimpanzee species are the closest living relatives to humans, all being members of the Hominini tribe (along with extinct species of Hominina subtribe). Chimpanzees are the only known members of the Panina subtribe. The two Pan species split only about one million years ago.

Why Did Dinosaurs Become Extinct?


Dinosaurs were considered to be the biggest of all the animals ever came on earth. Though they were huge still, they didn’t develop a good brain. They didn’t know how to survive and save themselves from their enemies. Some scientists even believe that they disappeared due to climate changes, even the swamps dried up and they couldn’t live on vegetation since most of these dinosaurs were vegetation.

Their food supply also disappeared. The earth started having seasons which were not fit for dinosaurs survival. So, dinosaurs could not survive.


Below Dinosaurs info from Wikipedia (

Dinosaurs (Greek: δεινόσαυρος, deinosauros) were the dominant vertebrate animals of terrestrial ecosystems for over 160 million years, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous period (65 million years ago), when most of them became extinct in the Cretaceous–Tertiary extinction event. The 10000 living species of birds may be classified as dinosaurs.

The term "dinosaur" was coined in 1842 by Sir Richard Owen and derives from Greek δεινός (deinos) "terrible, powerful, wondrous" + σαῦρος (sauros) "lizard". It is sometimes used informally to describe other prehistoric reptiles, such as the pelycosaur Dimetrodon, the winged pterosaurs, and the aquatic ichthyosaurs, plesiosaurs and mosasaurs, although none of these animals were dinosaurs. Through the first half of the 20th century, most of the scientific community believed dinosaurs to have been slow, unintelligent cold-blooded animals. Most research conducted since the 1970s, however, has supported the view that dinosaurs were active animals with elevated metabolisms and numerous adaptations for social interaction. The resulting transformation in the scientific understanding of dinosaurs has gradually filtered into popular consciousness.

Why Do Carnivores Animals Like Salt?


Since land animals have descended from the creatures living in the sea their body fluid is still the same as before, moving to the land. As they cannot obtain salt from plants or land so they require more salt. It’s the herbivores like giraffe and mouflon etc. need more salt for the plants do not contain much salt as they are drained away by the rain water.

Carnivores animals get the salt from the body fluid of their prey. Their tongues get sore; for healing salt is rubbed on their tongues.


Below Carnivores Animals info from Wikipedia (

A carnivore (pronounced /ˈkɑrnɪvɔər/), meaning 'meat eater' (Latin carne meaning 'flesh' and vorare meaning 'to devour'), is an animal that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of vertebrate and/or invertebrate animal tissue, whether through predation or scavenging.[1][2] Animals that depend solely on animal flesh for their nutrient requirements are considered obligate carnivores while those that also consume non-animal food are considered facultative carnivores.[2] Omnivores too consume both animal and non-animal food, and apart from the more general definition, there is no clearly defined ratio of plant to animal material that would distinguish a facultative carnivore from an omnivore, or an omnivore from a facultative herbivore, for that matter.[3] A carnivore that sits at the top of the foodchain is an apex predator.

Why Was Robin Hood Considered To Be An Important Character In Literature?

Robin Hood

Robin Hood was a balled character, who was invented to express the poor peasants resentment and their needs.

Though stealing is considered to be wrong still Robin Hood is admired as a hero because he used to steal from the rich and give it to the poor and needy.

It is believed that he lived during the 12th century. Because of his good deed he was made a hero as he would neither let any woman get hurt nor took riches from the poor. He was considered to be a great sports person and archer. Robin Hood loved nature.


Below Robin Hood info from Wikipedia (

Robin Hood is a hero in English folklore, a highly-skilled archer and outlaw. In particular, he is known for "stealing from the rich and giving to the poor" assisted by a group of outlaws known as his "Merry Men".[1] Robin and many of his men wore Lincoln green clothes.[2]

There are many songs and stories about him, starting in medieval times, and continuing through more modern literature, films and television series. In the earliest sources Robin Hood is a commoner, but he was often later portrayed as an aristocrat, wrongfully dispossessed of his lands and made into an outlaw.

Why Do People Collect Stamps?

Stamps Stamps

Stamp collection is considered to be a hobby. Millions of people all over the world collect stamps. For this purpose General Post Office has been set up to help people to collect stamps. Strange stamps are considered to be valuable as they are scarce.

During 1861, the South African post office was running short of stamps; so, a local firm was ordered to print a few stamps. The local firm, by mistake printed one penny Blue instead of Red and Four penny Red in place of Blue. So, these stamps were considered to be rare. People collect such rare stamps for the posterity to see and know its history.


Below Stamp Collecting info from Wikipedia (

Stamp collecting is the collecting of postage stamps and related objects, such as covers (envelopes or packages with stamps on them). It is one of the world's most popular hobbies, with estimates of the number of collectors ranging up to 20 million in the United States alone.

Collecting is not the same as philately, which is the study of stamps. A philatelist often does, but need not, collect the objects of study, nor is it necessary to closely study what one collects. Many casual collectors enjoy accumulating stamps without worrying about the tiny details. The creation of a large or comprehensive collection, however, may require some philatelic knowledge.

Stamp collectors are an important source of revenue for some small countries who create limited runs of elaborate stamps designed mainly to be bought by stamp collectors. The stamps produced by these countries far exceed the postal needs of the countries.[citation needed]

Some collectors have taken to philatelic investment.

Monday, August 24, 2009

Why Are The Rhinos (Rhinoceros) Endangered?


Some animal species have become extinct because they were less successful than other species, which gradually replaced them. But the number of rhinoceros has reduce due to hunting.

Poaching or illegal hunting has reduced drastically the number of black rhinos. Most of them are surviving and are conserved in national parks and wildlife sanctuaries.

The rhino is hunted specially for its horn. The rhino horn can grow up to 62 inches and fetches a good price when sold, thus making the animal endangered.


Below Rhinoceros info from Wikipedia (

Rhinoceros (pronounced /raɪˈnɒsərəs/), often colloquially abbreviated rhino, is a name used to group five extant species of odd-toed ungulates in the family Rhinocerotidae. Two of these species are native to Africa and three to southern Asia. Three of the five species—the Javan, Sumatran and Black Rhinoceros—are critically endangered. The Indian is endangered, with fewer than 2,700 individuals remaining in the wild. The White is registered as "vulnerable", with approximately 17,500 remaining in the wild, as reported by the International Rhino Foundation.[1][2] The Rhinoceros Beetle is named as such due to its horns, which simulate rhino's horns.

Why Do Giraffes Have Long Necks?


The Giraffe is the tallest among all living animals. The strange shape has made the giraffe perfectly suitable to obtain its food.

A giraffe eats only the leaves of the plants, so its height enables it to reach the leaves on trees which grow in tropical lands where there is less grass. A giraffe’s tongue is often a foot and half long which it can use skillfully to pick the smallest leaves from the thorny plants without being pricked.

It also has a long upper lip, which helps it to wrench off many leaves at a time. If the giraffe wants to drink water from the ground, it adopts a peculiar style of spreading its legs far apart, so that it can reach down easily.


Below Giraffes info from Wikipedia (

The giraffe (Giraffa camelopardalis) is an African even-toed ungulate mammal, the tallest of all land-living animal species, and the largest ruminant. It is covered in large, irregular patches of yellow to black fur separated by white, off-white, or dark yellowish brown background. The average mass for an adult male giraffe is 1,191 kilograms (2,630 lb) while the average mass for an adult female is 828 kilograms (1,830 lb).[3][4] It is approximately 4.3 metres (14 ft) to 5.2 metres (17 ft) tall, although the tallest male recorded stood almost 6 metres (20 ft).

Why Did Australia Recruit The Army To Destroy Emu?


Emu is the second largest bird in the world after the ostrich in Australia. It is 1.8 meters in height. They can travel 1,000 km in one year.

They are considered to be nomads or wandering species, who move from one place to another.

They cause heavy destruction to the crops in the field.

Thus, in the year 1932, the state of Western Australia took the help of an army machine gun and destroyed them. Each time they fired, these birds got scattered and soon after a month, the so called ‘The Emu War’ was abandoned.


The Emu info from Wikipedia (

The Emu (pronounced /ˈiːmjuː/[4][5]), Dromaius novaehollandiae, is the largest bird native to Australia and the only extant member of the genus Dromaius. It is also the second-largest extant bird in the world by height, after its ratite relative, the ostrich. The soft-feathered, brown, flightless bird reach up to 2 metres (6.6 ft) in height. The Emu is common over most of mainland Australia, although it avoids heavily populated areas, dense forest, and arid areas.[2] Emus can travel great distances at a fast, economical trot and, if necessary, can sprint at 50 km/h (31 mph) for some distance at a time.[2] They are opportunistically nomadic and may travel long distances to find food; they feed on a variety of plants and insects.

Why Do Birds Have Excellent Vision?

Birds Vision

All birds have a dominant sense of vision. In most of them, the eyes are placed so far to the side of the head that they have monocular vision, that is each eye can scan a separate area. This is an essential feature shared by all hunting creatures who depend on their vision to beware of possible danger.

Birds of prey and owls have eyes set more to the front of the head, giving a more binocular vision to judge distances. Birds also have a third eyelid, which moves sideways across the cornea and keeps it moist without interrupting their vision.


Below Birds Vision info from Wikipedia (

Vision is the most important sense for birds, since good eyesight is essential for safe flight, and this group has a number of adaptations which give visual acuity superior to that of other vertebrate groups; a pigeon has been described as "two eyes with wings".[1] The avian eye resembles that of a reptile, but has a better-positioned lens, a feature shared with mammals. Birds have the largest eyes relative to their size within the animal kingdom, and movement is consequently limited within the eye's bony socket.[1] In addition to the two eyelids usually found in vertebrates, it is protected by a third transparent movable membrane. The eye's internal anatomy is similar to that of other vertebrates, but has a structure, the pecten oculi, unique to birds.

Why Do Birds Sing?

Birds Sing

The song of birds is one of the loveliest gifts of nature. When birds sing, they are, in fact, communicating with each other. Of course, they sometimes sing as expressions of joy.

When wild birds migrate at night, they cry out. These cries keep the birds together and help the lost ones to return to the flock.

Birds don’t learn to sing, it is an inborn instinct. Some birds do learn the songs of other birds. For example, a parrot can imitate the sound which it hears.


Below Birds info from Wikipedia (

Birds (class Aves) are winged, bipedal, endothermic (warm-blooded), vertebrate animals that lay eggs. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Birds range in size from the 5 cm (2 in) Bee Hummingbird to the 3 m (10 ft) Ostrich. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, around 150–200 Ma (million years ago), and the earliest known bird is the Late Jurassic Archaeopteryx, c 155–150 Ma. Most paleontologists regard birds as the only clade of dinosaurs that survived the Cretaceous–Tertiary extinction event approximately 65.5 Ma.

Many species undertake long distance annual migrations, and many more perform shorter irregular movements. Birds are social; they communicate using visual signals and through calls and songs, and participate in social behaviours including cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially monogamous, usually for one breeding season at a time, sometimes for years, but rarely for life. Other species have breeding systems that are polygynous ("many females") or, rarely, polyandrous ("many males"). Eggs are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.

Why Does The Peacock Raise Its Feathers?


The display of peacock’s tail feather is one of the most spectacular sights. Greeks and Romans considered the peacock as a sacred bird. The male peacock displays its gorgeous plumage for its female, the peahen.

A peacock is 7 to 8 feet long, out of which the tail is of 3 to 4 feet. At regular intervals, there are ‘eyes’, which change colour. The longer tail, is raised and held up by the stiff quills of the shorter, true tail.


Below Peacock info from Wikipedia (

The term peafowl can refer to the two species of bird in the genus Pavo of the pheasant family, Phasianidae. The African Congo Peafowl is placed in its own genus Afropavo. Peafowl are best known for the male's extravagant tail feathers, which it displays as part of courtship. The male is called a peacock, the female a peahen[1], though it is common to hear the female also referred to as a "peacock."

The two species are:

    * Indian Peafowl, Pavo cristatus is a resident breeder in the Indian subcontinent. The peacock is designated as the national bird of India.

    * Green Peafowl, Pavo muticus breeds from Burma east to Java. The IUCN lists the Green Peafowl as vulnerable to extinction due to hunting and a reduction in extent and quality of habitat.

Why Can’t The Fish Survive Out Of Water?

Fish Out of Water

Fishes are adapted in such a way that they can breathe underwater. They have gills on each side of their head. These gills carry tiny blood vessels.

The fish gulp in water though their mouths and pass it out through the gills. The gills extract oxygen from the water and pass it into the fish’s blood. Thus, the fish gills have the same function as the lungs but they cannot work without water and, hence, fish cannot survive outside water.


Below Fish info from Wikipedia (

A fish is any aquatic vertebrate animal that is typically ectothermic (or cold-blooded), covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in fresh water, with species being known from mountain streams (e.g., char and gudgeon) as well as in the deepest depths of the ocean (e.g., gulpers and anglerfish).

Food prepared from fish is also called fish, and it is an important food source for humans. They are harvested either from wild fisheries (see fishing) or farmed in much the same way as cattle or chickens (see aquaculture). They are also exploited by recreational fishers and fishkeepers, and are exhibited in public aquaria. Fish have had a role in many cultures through the ages, ranging from deities and religious symbols to the subjects of books and popular movies.

Why Are The Coral Reefs Protected?

Coral Reefs

Coral Reefs are the marine form of rain forests. They provide shelter to thousands of species of fish and invertebrates, all living in a complex balance, which make the reef system an extremely stable environment as long as man does not intervene.

Marine biologists spend a lot of time studying the reef and make valuable discoveries. Coral reefs always face the threats of extinction. Thus, people must be educated and made aware of these reefs throughout the world.


Below Coral Reefs info from Wikipedia (

Coral reefs are aragonite structures produced by living organisms, found in marine waters containing few nutrients. In most reefs, the predominant organisms are stony corals, colonial cnidarians that secrete an exoskeleton of calcium carbonate. The accumulation of skeletal material, broken and piled up by wave action and bioeroders, produces a calcareous formation that supports the living corals and a great variety of other animal and plant life.

Coral reefs most commonly live in tropical waters, but deep water and cold water corals exist on a much smaller scale.

Globally, coral reefs are under threat from climate change, ocean acidification, overuse of reef resources, and harmful land-use practices. High nutrient levels such as those found in runoff from agricultural areas can harm reefs by encouraging excess algae growth.

Why Do Bats Fly Only At Night?


Bats are small winged creatures and doesn’t need sunlight. They swoop at night between houses and plants with surprising speed, catching the inserts.

They avoid all kinds of obstacles by quick deliberate movements. A sixth sense guides them at night and helps them to ‘see’ the dangers and avoid them in time. This sixth sense works like our modern radar. As the bat flies, it emits a series of very shrill sounds.

When some obstacle gets in its way, these ultrasonic sounds are bounced back within fraction of a second. the bat hears, recognizes, calculates and keeps the obstacle away with a flap of it’s wings.


Below Bats info from Wikipedia (

Bats are mammals in the order Chiroptera (pronounced /kaɪˈrɒptərə/). The forelimbs of bats are developed as wings, making them the only mammals naturally capable of flight (opposed to other mammals, such as flying squirrels, gliding possums and colugos, that glide only for a distance). Bats do not flap arms like birds, instead they flap spread out hands where their fingers[2] are very long and covered with a thin membrane or patagium. Chiroptera comes from two Greek words cheir (χειρ) "hand" and pteron (πτερον) "wing."

Why Does The Chameleon Often Change Its Colour?


A close relative of the lizard, chameleons are found in the whole of Africa and in some parts of Asia. It can grow up to a length of 60 cms. The most striking thing about the chameleon is the speed with which it can change its colour from white to yellow, to black, to green or to brown.

These changes occur due to the change of light and temperature of its surroundings and the condition of the animal. The chameleon does not need to camouflage because when it is hunting, it is able to deceive its prey by remaining perfectly still on a branch for hours.

It very easily catches its prey over long distances because of its sticky tongue, which can dart out up to 10 cms. Its large prominent eyes can turn 180° and each eye can move independently making it an expert hunter.


Below Chameleon info from Wikipedia (

The family Chamaeleonidae are a distinctive and highly specialized clade of lizards. They are distinguished by their parrot-like zygodactylous feet, their separately mobile and stereoscopic eyes, their very long, highly modified, and rapidly extrudable tongues, their swaying gait, and the possession by many of a prehensile tail, crests or horns on their distinctively shaped heads, and the ability of some to change color. Uniquely adapted for climbing and visual hunting, the approximately 160 species of chameleon range from Africa, Madagascar, Spain and Portugal, across south Asia, to Sri Lanka, have been introduced to Hawaii and California, and are found in warm habitats that vary from rain forest to desert conditions.

Why Do The Salmons Go Upstream To Spawn?


The instinct that takes the Salmon on the long trip upstream is the fact that they go to a sort of headquarters of a stream to Spawn. This helps a new Salmon to be born and grow.

When the Salmons enter fresh water, they are in better condition, but as soon as they reach the fresh water, they stop feeding.

They often search for an exact place to deposit their eggs. The young Salmons remain in fresh water for about an year and then descend from the streams and enter the salt water. Hence, the cycle begins all over again.


Below Salmon info from Wikipedia (

Salmon is the common name for several species of fish of the family Salmonidae. Several other fish in the family are called trout; the difference is often attributed to the migratory life of the salmon as compared to the residential behaviour of trout, a distinction that holds true for the Salmo genus. Salmon live in both the Atlantic (one migratory species Salmo salar) and Pacific Oceans, as well as the Great Lakes (approximately a dozen species of the genus Oncorhynchus).

Typically, salmon are anadromous: they are born in fresh water, migrate to the ocean, then return to fresh water to reproduce. However, there are rare species that can only survive in fresh water habitats. Folklore has it that the fish return to the exact spot where they were born to spawn; tracking studies have shown this to be true but the nature of how this memory works has long been debated.

Sunday, August 23, 2009

Why Do We Find A Lot Of Snails Usually After Rain?


After a shower of rain, many snails come out among the grass and bushes.

They can be seen moving slowly among the wet vegetation. Snails need a great deal of moisture for their active life and that is why they come out after rain, but retire to their shells and bury themselves in the ground during periods of drought.

In winters, they hibernate after sealing the opening of the shell with a plug of sticky material, which keeps them away from the cold. As snails need a good amount of moisture, they also come out early in the morning when there are dew drops on the ground.


Below Snails info from Wikipedia (

The word snail is a common name for almost all members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word snail is used in a general sense, it includes sea snails, land snails and freshwater snails.

Snails lacking a shell or having only a very small one are usually called slugs. Snails that have a broadly conical shell that is not coiled or appears not to be coiled are usually known as limpets.

Snails can be found in a wide range of environments from ditches, deserts, and the abyssal depths of the sea. Although most people are familiar with terrestrial snails, land snails are in the minority. Marine snails have much greater diversity and a greater biomass. The great majority of snail species are marine. Numerous kinds can be found in fresh water and even brackish water. Many snails are herbivorous, though a few land species and many marine species are omnivores or predatory carnivores.

Saturday, August 22, 2009

Why Are Some Frogs Poisonous?


All frogs are not poisonous, but some of them have a kind of venom, which they use when they are attacked by predators.

The common toad exudes poison through its skin if it is attacked. Cave toads contain a drug that can cause hallucinations if these are eaten.

The skin of some frogs and toads contains poisons, which are among the most powerful known to the humans.


Below Frogs info from Wikipedia (

Many frogs contain mild toxins that make them unpalatable to potential predators. For example, all toads have large poison glands—the parotoid glands—located behind the eyes on the top of the head. Some frogs, such as some poison dart frogs, are especially toxic. The chemical makeup of toxins in frogs varies from irritants to hallucinogens, convulsants, nerve poisons, and vasoconstrictors. Many predators of frogs have adapted to tolerate high levels of these poisons. Others, including humans, may be severely affected.

Some frogs obtain poisons from the ants and other arthropods they eat;[8] others, such as the Australian Corroboree Frogs (Pseudophryne corroboree and Pseudophryne pengilleyi), can manufacture an alkaloid not derived from their diet.[9] Some native people of South America extract poison from the poison dart frogs and apply it to their darts for hunting,[10] although few species are toxic enough to be used for this purpose. It was previously a misconception the poison was placed on arrows rather than darts. The common name of these frogs was thus changed from "poison arrow frog" to "poison dart frog" in the early 1980s. Poisonous frogs tend to advertise their toxicity with bright colours, an adaptive strategy known as aposematism. There are at least two non-poisonous species of frogs in tropical America (Eleutherodactylus gaigei and Lithodytes lineatus) that mimic the colouration of dart poison frogs' coloration for self-protection (Batesian mimicry).

Why Do Some Insects Have Bright Colours?

Stick Insects Stick Insects


Insects try to protect themselves from their enemies in many different ways. Some insects like wasps and ants have powerful stings or shower poisonous fluid on the enemies.

The housefly doesn’t sting, but since its colour resembles a wasp or a bee, its enemies are wary of it. Stick insects use camouflage. They look like the leaves and twigs among which they feed. The bright colours of some insects warn their enemies that they may be poisonous.


Below Stick Insects info from Wikipedia (

The Phasmatodea (sometimes called Phasmida) are an order of insects, whose members are variously known as stick insects (in Europe and Australasia), walking sticks or stick-bugs (in the United States), phasmids, ghost insects and leaf insects (generally the family Phylliidae). The ordinal name is derived from the Greek "phasma" meaning an apparition or phantom, and refers to the resemblance of many species to sticks or leaves. Their natural camouflage can make them extremely difficult to spot.

Why Is The Ladybird Useful To Gardeners or Farmers?

Ladybird Ladybird and Rose Yellow Ladybird

Beatles are among the most harmful insects, but one exception in this family is the charming ladybird with seven spots and bright red wing-case.

It is shaped like an egg which has been cut in half length wise. Ladybird is very fond of aphid or greenfly, which attacks roses and is thus a great friend of gardeners and farmers.

Even the eggs of ladybird are deposited on plants so that when the tiny lady birds hatch out, they will feed on the greenfly. The life cycle of lady birds are only just over a month, hence in once season, several generations of ladybirds are born.


Below Ladybirds info from Wikipedia (

Coccinellidae is a family of beetles, known variously as ladybirds (British English, Australian English, South African English), ladybugs (North American English) or lady beetles (preferred by some scientists). Lesser-used names include ladyclock, lady cow, and lady fly.[1]

They are small insects, ranging from 1 mm to 10 mm (0.04 to 0.4 inches), and are commonly yellow, orange, or scarlet with small black spots on their wing covers, with black legs, head and antennae. A very large number of species are mostly or entirely black, grey, or brown and may be difficult for non-entomologists to recognize as coccinellids (and, conversely, there are many small beetles that are easily mistaken as such, like tortoise beetles).

Why Are The Spiders Not Insects?


Spiders belong to the class of arachnids like the scorpions and mites. Unlike the insects, they have eight legs, eight eyes and in most cases, no wings and only two, not three, parts to their bodies.

Spiders are found everywhere in every kind of climate. They manufacture a silk with which they spin this web.

At the tip of its abdomen, there are spinning organs having holes. The silk is forced out through these holes, which becomes solid as soon as it comes in contact with air. Spiders are meat eaters, feed on insects and other spiders, which get trapped in their web.


Below Spiders info from Wikipedia (

Spiders (order Araneae) are air-breathing chelicerate arthropods that have eight legs, and chelicerae modified into fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms[1]. Spiders are found world-wide on every continent except for Antarctica, and have become established in nearly every ecological niche with the exception of air and sea colonization. As of 2008, approximately 40,000 spider species, and 109 families have been recorded by taxonomists.[2] However, there has been confusion within the scientific community as to how all these genera should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900.

Why Are Some Flowers Very Colourful?


A plant reproduces through its flowers. A Flowers can contain either the male or female organ or both together.

Flowers have brightly coloured petals or sepals. The reason why flowers are so brightly coloured and perfumed is to attract insects.

Insects play a very important part in pollinating them. Some plants also produce a sugary liquid called nectar, which attracts the bees. As insects fly from flower to flower, they help to transfer the pollen to the stigma of the flower, resulting in fertilization.


Below Flowers info from Wikipedia (

Plants can not move from one location to another, thus many flowers have evolved to attract animals to transfer pollen between individuals in dispersed populations. Flowers that are insect-pollinated are called entomophilous; literally "insect-loving" in Latin. They can be highly modified along with the pollinating insects by co-evolution. Flowers commonly have glands called nectaries on various parts that attract animals looking for nutritious nectar. Birds and bees have color vision, enabling them to seek out "colorful" flowers. Some flowers have patterns, called nectar guides, that show pollinators where to look for nectar; they may be visible only under ultraviolet light, which is visible to bees and some other insects. Flowers also attract pollinators by scent and some of those scents are pleasant to our sense of smell. Not all flower scents are appealing to humans, a number of flowers are pollinated by insects that are attracted to rotten flesh and have flowers that smell like dead animals, often called Carrion flowers including Rafflesia, the titan arum, and the North American pawpaw (Asimina triloba). Flowers pollinated by night visitors, including bats and moths, are likely to concentrate on scent to attract pollinators and most such flowers are white.

Why Do Plants Produce Seeds?


Embryo, from which a new plant grows, is is contained in a seed. The seed also contains a food stored to nourish the embryo until it develops roots and leaves.

The seed is enclosed in a tough coat to protect it from drying out. Many seeds are dispersed by the wind.

Other seeds have wings that allow them to glide and get dispersed. Some seeds are dispersed by plants and animals. Water also helps in the dispersal of seeds. All seeds help a new plant of its kind to grow.


Below Seeds info from Wikipedia (

A seed (en-us-seed.ogg /ˈsiːd/ (help·info)), referred to as a kernel in some plants, is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant. The formation of the seed completes the process of reproduction in seed plants (started with the development of flowers and pollination), with the embryo developed from the zygote and the seed coat from the integuments of the ovule.

Seeds have been an important development in the reproduction and spread of flowering plants, relative to more primitive plants like mosses, ferns and liverworts, which do not have seeds and use other means to propagate themselves. This can be seen by the success of seed plants (both gymnosperms and angiosperms) in dominating biological niches on land, from forests to grasslands both in hot and cold climates.

Why Do The Flowers Have So Many Varied Shapes?


The reason that flowers come in so many different shapes and colours is so that they are able to fertilize.

Flowers rely on insects for pollination but it fertilizes only when an insect carries the pollen from the same plant. The shape of the flower ensures that only a certain kind of insect can pollinate it. Flat flowers like sunflower, Roses, etc. are visited by bees, whereas flowers that are tube shaped attract only insects which have long tongues.


Below Flowers info from Wikipedia (

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). The biological function of a flower is to mediate the union of male sperm with female ovum in order to produce seeds. The process begins with pollination, is followed by fertilization, leading to the formation and dispersal of the seeds. For the higher plants, seeds are the next generation, and serve as the primary means by which individuals of a species are dispersed across the landscape. The grouping of flowers on a plant is called the inflorescence.

In addition to serving as the reproductive organs of flowering plants, flowers have long been admired and used by humans, mainly to beautify their environment but also as a source of food.

Why Is The Banana Plant Not A Tree?

Banana Plant

The banana is a giant plant, which grows from an underground tem or rhizome, and dies after producing its fruit. What looks like a trunk is in fact made of the superimposed sheaths of the large leaves.

The leaves are very fragile. The fruit initially is a flowering growth on the top of the plant but after pollination, the female flowers develop into bananas. Since each stalk lives only for a year. It has no main root.

Hence the banana is a plant and not a tree. As soon as the fruit attains full maturity, the plant dries up and dies. But, the rhizome develops fresh shoots for growth of new banana plants.


Below Banana info from Wikipedia (

Banana is the common name for a type of fruit and also the herbaceous plants of the genus Musa which produce this commonly eaten fruit. They are native to the tropical region of Southeast Asia. Bananas are likely to have been first domesticated in Papua New Guinea.[1] Today, they are cultivated throughout the tropics.[2]

Banana plants are of the family Musaceae. They are cultivated primarily for their fruit, and to a lesser extent for the production of fibre and as ornamental plants. As the banana plants are normally tall and fairly sturdy they are often mistaken for trees, but their main or upright stem is actually a pseudostem. For some species this pseudostem can reach a height of up to 2–8 m, with leaves of up to 3.5 m in length. Each pseudostem can produce a bunch of green bananas which when ripened often turn yellow or sometimes red. A variety was even recently discovered in a rainforest in Asia that turns purple. This then dies and is replaced by another pseudostem.

Why Do The Trees Have Bark?


The outer portion of a woody stem is called ‘bark’. The main function of the bark is to protect the inner, delicate structures. It protects them from drying out and also from injuries. The bark is formed over the years.

Some of the outer portions become dry and die. Some of these dry pieces are shed or broken off as the tree grows larger and larger. In the palm tree, there is no clear separation between the bark and the wood.


Below Bark info from Wikipedia (

Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines and shrubs. Bark refers to all the tissues outside of the vascular cambium and is a nontechnical term.[1] It overlays the wood and consists of the inner bark and the outer bark. The inner bark, which in older stems is living tissue, includes the innermost area of the periderm. The outer bark in older stems, includes the dead tissue on the surface of the stems, along with parts of the innermost periderm and all the tissues on the outer side of the periderm. The outer bark on trees is also called the rhytidome. Products used by people that are derived from bark include: spices and other flavorings, tannin, resin, latex, medicines, poisons, various hallucinatory chemicals and cork. Bark has been used to make cloths, canoes, ropes and used as a surface for paintings and map making;[2] A number of plants are also grown for their attractive or interesting bark colorations and surface textures.

Why Do Cloves Make The Land Fertile?


Cloves, a very important plant, are cultivated for animal food. Wherever cloves grow the soil becomes more fertile after a certain time.

The roots of this tiny plant have small nodules containing special bacteria which absorb nitrogen from the air and fix it in the soil. Thus, it makes the soil suitable for cultivation. Cloves can be easily distinguished from other grasses of the meadows.


Below Cloves info from Wikipedia (

Cloves (Syzygium aromaticum, syn. Eugenia aromaticum or Eugenia caryophyllata) are the aromatic dried flower buds of a tree in the family Myrtaceae. Cloves are native to Indonesia and India and used as a spice in cuisine all over the world. The English name derives from Latin clavus 'nail' (also origin of French clou 'nail') as the buds vaguely resemble small irregular nails in shape. Cloves are harvested primarily in Indonesia, Madagascar, Zanzibar, Pakistan, and Sri Lanka; it is also grown in India under the name Lavang, called "lavanga" (లవంగ) in Telugu.

Cloves can be used in cooking either whole or in a ground form, but as they are extremely strong, they are used sparingly. The spice is used throughout Europe and Asia and is smoked in a type of cigarettes locally known as kretek in Indonesia. A major brand of kreteks in the United States is Djarum, which sells Djarum Black. Cloves are also an important incense material in Chinese and Japanese culture.

Thursday, August 20, 2009

Why Do Cacti Have No Leaves?


A cactus (plural : Cacti) plant is able to exist even in extreme conditions. For this, the plant has certain basic structures and processes. The work that is done by leaves in other plants is done by stems and branches of the Cacti.

Since leaves are absent and Cacti have spine-covered branches and stems, they are able to survive in hot dry regions. The thick skins of the stems and branches with a few pores, prevent the loss of water. The root of cacti are spread out close to the surface of the ground thus it quickly absorb water.

The water is stored in the spongy hollow stems of the cactus. The outer layer of the plant is thick and waxy, therefore prevents the water to escape.


Below Cacti info from Wikipedia (

A cactus (plural: cacti') is any member of the plant family Cactaceae, native to the Americas. They are often used as ornamental plants, but some are also crop plants. Cacti are grown for protection of property from wild animals, as well as many other uses. Cacti are part of the plant order Caryophyllales, which also includes members like beets, gypsophila, spinach, amaranth, tumbleweeds, carnations, rhubarb, buckwheat, plumbago, bougainvillea, chickweed and knotgrass.

Why Do Leaves Fall In Autumn Season?


The sunlight becomes less during autumn season, the veins that carry sap into and out of a leaf slowly closes up. A layer of cells, known as the separation layer, develops at the base of the stem of the leaf. Slowly the leaf is separated from the tissue which is connected to the branch, and it falls.

In early autumn, due to short days and less intensity of sunlight, leaves start the processes of their fall Needles and leaves that fall doesn’t get wasted. They decompose and help the soil with nutrient forming the spongy humus layer of the forest floor which absorb the rainfall. These leaves provide food for numerous organisms found in the soil and is quite important to the ecosystem of forest.


Below Autumn Leaves info from Wikipedia (

Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, one or many colors that range from red to yellow. The phenomenon is commonly called fall colors and autumn colors, while the expression fall foliage usually connotes the viewing of a tree or forest whose leaves have undergone the change. In some areas in the United States and Canada, "leaf peeping" tourism between the beginning of color changes and the onset of leaf fall, or scheduled in hope of coinciding with that period, is a major contribution to economic activity.

Monday, August 17, 2009

Why Is The Seaweed Of So Many Colours?


Each ocean has its own distinct varieties of seaweed. The green seaweeds are found in the shallowest parts of the sea. The brown and red varieties of seaweed grow at deeper levels. The coloured pigments of the seaweed enable them to use the sunlight. In the temperate zone the most common seaweed is the brown algae.

Along the Atlantic and Pacific coasts grows, the Kelp, another form of seaweed. Seaweeds act as fertilizers and are also a source of iodine. It is also a primary source of food for the ocean life.


Below Seaweed info from Wikipedia (

Seaweed is a loose colloquial term encompassing macroscopic, multicellular, benthic marine algae.[1] The term includes some members of the red, brown and green algae. Seaweeds can also be classified by use (as food, medicine, fertilizer, industrial, etc.).

A seaweed may belong to one of several groups of multicellular algae: the red algae, green algae, and brown algae. As these three groups are not thought to have a common multicellular ancestor, the seaweeds are a paraphyletic group. In addition, some tuft-forming bluegreen algae (Cyanobacteria) are sometimes considered as seaweeds — "seaweed" is a colloquial term and lacks a formal definition.

Why Do We Remember Charles Darwin?

Charles Darwin

The English scientist Charles Darwin is remembered for his ideas for evolution, which he developed after years of study and voyage of exploration.

During these explorations, he discovered that many small islands had population of unique creatures.

Darwin was able to prove how these creatures differed from their close relatives elsewhere. For example, he found a unique range of animal life in the Galapagos Islands.

Charles Darwin is remembered of his famous book ‘Origin of Species’.


Below Charles Darwin info from Wikipedia (

Charles Robert Darwin FRS (12 February 1809 – 19 April 1882) was an English naturalist[I] who realised and presented compelling evidence that all species of life have evolved over time from common ancestors,[1][2] through the process he called natural selection. The fact that evolution occurs became accepted by the scientific community and much of the general public in his lifetime,[3] but it was not until the emergence of the modern evolutionary synthesis from the 1930s to the 1950s that a broad consensus developed that natural selection is the basic mechanism of evolution.[4] In modified form, Darwin’s scientific discovery is the unifying theory of the life sciences, explaining the diversity of life.

Saturday, August 15, 2009

Why Are Fungi Not Green In Colour?


For the preparation of food, most plants make use of a special substance called chlorophyll through which water and mineral salts are absorbed from the soil, CO2 from the air and are changed into starches, needed for the plant’s growth.

This chlorophyll gives the plants their green colour. Some plants like fungi do not have chlorophyll and are to grow in the dark. Fungi grow in caves and underground places.

These plants (i.e. fungi) depend on organic substances produced by other plants. Most of the fungi do not have chlorophyll and hence are not green in colour.


Below Fungi info from Wikipedia (

A fungus (pronounced /ˈfʌŋɡəs/) is any member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. The Fungi (pronounced /ˈfʌndʒaɪ/ or /ˈfʌŋɡaɪ/) are classified as a kingdom that is separate from plants and animals. One major difference is that fungal cells have cell walls that contain chitin, unlike the cell walls of plants, which contain cellulose. These and other differences show that the fungi form a single group of related organisms, named the Eumycota (true fungi or Eumycetes), that share a common ancestor (a monophyletic group). This fungal group is distinct from the structurally similar slime molds (myxomycetes) and water molds (oomycetes). The discipline of biology devoted to the study of fungi is known as mycology, which is often regarded as a branch of botany, even though genetic studies have shown that fungi are more closely related to animals than to plants. Fungi reproduce via spores, which are often produced on specialized structures or in fruiting bodies, such as the head of a mushroom.

Why Do Plants Have Roots?


A plant needs roots for anchoring itself to the ground and to absorb mineral salts and water from the soil. Most plants have their roots growing in the soil.

Roots regularly elongate at their tips and come in contact with new portions of the soil. Roots can be of two kinds, some plants have large, bulky roots called tap roots; some plants like grasses have fibrous roots. Fibrous roots protect soil from erosion.

There are some plants whose roots do not grow in the soil. Some tropical orchids that grow on trees have spongy roots.


Below Plant’s Root info from Wikipedia (

In vascular plants, the root is the organ of a plant that typically lies below the surface of the soil. This is not always the case, however, since a root can also be aerial (growing above the ground) or aerating (growing up above the ground or especially above water). Furthermore, a stem normally occurring below ground is not exceptional either (see rhizome). So, it is better to define root as a part of a plant body that bears no leaves, and therefore also lacks nodes. There are also important internal structural differences between stems and roots. The first root that comes from a plant is called the radicle. The two major functions of roots are 1) absorption of water and inorganic nutrients and 2) anchoring of the plant body to the ground. In response to the concentration of nutrients, roots also synthesise cytokinin, which acts as a signal as to how fast the shoots can grow. Roots often function in storage of food and nutrients. The roots of most vascular plant species enter into symbiosis with certain fungi to form mycorrhizas, and a large range of other organisms including bacteria also closely associate with roots.

Why Are Latin Names Given To All Living Things?

Carl Linnaeus

Most plants and animals have popular names varying from place to place.

So, such a name was required to be given that could be easily recognized everywhere.

Hence, Latin names were used for the scientific names of the living things. Carl Linnaeus was the man who established the modem scientific method of naming plants and animals.

The scientific names has two parts – the generic name, describing the group to which the living thing belongs and the specific name for that living thing only.


Below Carl Linnaeus info from Wikipedia (

Carl Linnaeus (Latinized as Carolus Linnaeus, also known after his ennoblement as sv-Carl_von_Linné.ogg Carl von Linné (help·info), May 23 [O.S. May 12] 1707 – January 10, 1778) was a Swedish botanist, physician, and zoologist, who laid the foundations for the modern scheme of binomial nomenclature. He is known as the father of modern taxonomy, and is also considered one of the fathers of modern ecology.

Linnaeus was born in the countryside of Småland, in southern Sweden. His father was the first in his ancestry to adopt a permanent last name; prior to that, ancestors had used the patronymic naming system of Scandinavian countries. His father adopted the Latin-form name Linnaeus after a giant linden tree on the family homestead. Linnaeus got most of his higher education at Uppsala University and began giving lectures of botany there in 1730. He lived abroad between 1735–1738, where he studied and also published a first edition of his Systema Naturae in the Netherlands. He then returned to Sweden where he became professor of botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 60s, he continued to collect and classify animals, plants, and minerals, and published several volumes. At the time of his death, he was widely renowned throughout Europe as one of the most acclaimed scientists of the time.

Friday, August 14, 2009

Why Do Nuclear Reactors Need Continuous Monitoring?

Nuclear Power Station

The nuclear reactors are continuously monitored because when energy is released from an atom, deadly rays of radiation also come out. This radiation is very harmful when it enters the body.

This is because when too much radiation passes through living cells, it damages the cells or weakness the body’s defences against disease.

A typical nuclear power station produces a lot of waste each year, which is poured into steel tanks and then buried in concrete.


Below Nuclear Power info from Wikipedia (

Nuclear power is any nuclear technology designed to extract usable energy from atomic nuclei via controlled nuclear reactions. The only method in use today produces power via nuclear fission, though other methods might one day include nuclear fusion and radioactive decay (see below). All utility-scale reactors[1] heat water to produce steam, which is then converted into mechanical work for the purpose of generating electricity or propulsion. In 2007, 14% of the world's electricity came from nuclear power. Also, more than 150 nuclear-powered naval vessels have been built, and a few radioisotope rockets have been produced.

Why Is Helicopter Not A Modern Discover?


Leonardo Do Vinci, the famous artist, drew his plans for a helicopter hundreds of years before man actually made it.

Today’s helicopters are lifted into the air by their rotating propellers. These work like narrow wings, generating lift as they spin rapidly through air. It climbs by increasing the angle of the rotor blades. It moves forward by increasing the angle of the blade moving back on every rotation, so that it pushes against the air.


Below Helicopter info from Wikipedia (

A helicopter is an aircraft that is lifted and propelled by one or more horizontal rotors, each rotor consisting of two or more rotor blades. Helicopters are classified as rotorcraft or rotary-wing aircraft to distinguish them from fixed-wing aircraft because the helicopter achieves lift with the rotor blades which rotate around a mast. The word 'helicopter' is adapted from the French hélicoptère, coined by Gustave de Ponton d'Amecourt in 1861, which originates from the Greek helix/helik- (ἕλικ-) = "spiral" or "turning" and pteron (πτερόν) = "wing".

The primary advantage of a helicopter is from the rotor which provides lift without the aircraft needing to move forward, allowing the helicopter to take off and land vertically without a runway. For this reason, helicopters are often used in congested or isolated areas where fixed-wing aircraft cannot take off or land. The lift from the rotor also allows the helicopter to hover in one area more efficiently than other forms of vertical takeoff and landing aircraft, allowing it to accomplish tasks that fixed-wing aircraft cannot perform.

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