80 items in this section. Displaying page 4 of 8
Great White Sharks Heading for Extinction
If you want a beach crowded with surfers and swimmers and other sun worshippers to empty out within a minute, cup your hands by the side of your mouth and shout loudly, ‘SHARK’ and wait for this miracle to happen. Because the very word conjures up images from Steven Spielberg’s movie ‘Jaws’. An image of a gaping mouth with rows of razor-sharp teeth and a greyish white shark thrashing around in murky water, grappling with its catch....
Scientists Find More on the Eureka Man
Why do ships float on water when in fact they should sink? Why does paper float on water and a paperweight sink? The answer to these questions was accidentally discovered 2200 years ago by the Greek inventor and mathematician, Archimedes. One day, while getting into his bath he noticed water spilling over the sides. In a flash, Archimedes realised the relation between the water that had fallen out and the weight of his body – in other words he discovered why some objects float and some sink!...
The Whale Hunt is On
Japan has sent out a fleet of ships on a two-month mission. Officials say that the expedition has a harmless aim: it is merely a survey to collect data on the Bryde, Sperm and Minke whales’ habitats, diet and migration patterns. The Whale Hunt is On [Illustration by Shiju George] But the environmentalists are up in arms against them. What has shocked them is the Japanese intent to catch and kill 160 whales....
Who's the Brainiest animal of Them All?
The next time someone calls you an ape or a bird brain, ask her to think again. Brain scans of animals have revealed similar patterns of electrical activity in human and animal brains, so obviously humans aren’t the only smart ones around. Who’s the Brainiest of Them All? The brainiest animals are chimpanzees, which share 99 per cent of the human deoxyribonucleic acid or DNA as it is known. (DNA is a chain of molecules within the nucleus of a cell that have all the genetic information influencing the characteristics we inherit from our parents....
Why Don't Spiders Get Caught in Their Webs?
Spiders are not insects but are classified by biologists as arachnids. Arachnids are different from insects as they have eight legs and no antennae. There are over 40,000 species of spiders and some of them build webs while others rely on speed to catch their prey. A spider building its web is extremely fascinating to watch. Some spin these webs by squirting silken threads from modified excretory glands in their body. Each silk gland (some species have up to five) produces a different type of silk....
The Earthworm's Good Turn
Every day, countless dustbins are emptied in dumping grounds. A lot of this garbage ends up polluting the ground water and also the rivers and seas. Actually, a large part of this junk, especially the biodegradable waste (waste that can be decomposed) can be disposed in a more efficient manner, without polluting water bodies. Many countries are now doing it by using a cheap and eco-friendly option – the earthworm. Yes, earthworms have been in the business of decomposing waste and enriching the soil for thousands of years....
What are Volcanic Tubeworms?
In order to raise chicks the farmer keeps the eggs warm and is careful not to crush them. But when scientists in the University of Southern California rear tubeworms, they keep the immature worms very cold and under high pressure. You would think the scientists are being cruel by subjecting these little worms to such extreme conditions. They are not. The worms can thrive only under these circumstances, because they live in the deep sea where it is very cold....
Jellyfish: Fragile Creature of the Sea
A sudden influx of jellyfish, in the Gulf of Mexico in the Atlantic Ocean is worrying both scientists and fisher folk alike. The Gulf of Mexico is bordered on the north by the United States, on the east by Cuba, and on the south and west by Mexico. Fragile Creature of the Sea [Illustration by Sudheer Nath] Jellyfishes are invertebrates (animals without a spinal column). Some are also venomous and their sting can cause paralysis....
Evergreen Clothes
There is good news for those who love splashing around in rain puddles and don’t want to get their clothes dirtied. Or those who play soccer but don’t want their shirts to get soiled or wet with sweat. British scientists have created a fabric that never gets dirty or wet! Evergreen Clothes [Illustration by Sudheer Nath] The cloth is treated with a special non-sticky chemical that repels grease and water. This ensures that the clothes remain squeaky clean....
Is the Red Colobus monkey extinct?
Unbelievable but true! A large West African monkey has simply vanished from the earth. It has joined the Dodo, by becoming the first primate to vanish in the 20th century. After a six-year long survey, scientists and wildlife experts have declared the monkey, known as Miss Waldron’s Red Colobus monkey, extinct. Primatologists (people who study the evolution of apes and monkeys) carried out exhaustive surveys in Ghana and the Ivory Coast, in Africa, but failed to spot a single monkey of the species....