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Who, what, where, when & how - Now displaying 81 to 90
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How Far Away are the Stars?
Stars are thousands and thousands of miles away. But how do astronomers calculate this distance... Read on ...
Why's the Sun Red at Sunrise and Sunset?
At daybreak, the sun appears as a reddish ball. It gives way to a golden-white sheen as the day advances and reappears as an orange ball at the time of setting. Does the sun really change colour or does it only seem so? Read on ...
What is a Kangaroo Rat?
Its hind legs are larger than its fore legs and the rat uses its tail to balance itself. It even hops around like a kangaroo. And this desert creature requires practically no water to survive. Read on ...
Why do Humans Sweat?
As the Indian summer approaches the rickety air coolers come out of the closets. But do you know that our bodies have their own system of cooling? And that involves sweating... Read on ...
Why do Ants walk in a Line?
Look carefully. The little black dashes on the wall are ants walking in a line. It is their way of finding their way about without the help of gadgets like compasses. Read on ...
What is the potato - fruit or root?
The potato is a stem that grows under the ground, the onion is actually a leaf. These are ways by which plants have adapted themselves to their surroundings, to store water and food. Read on ...
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Who's the Brainiest of Them All?
Chimpanzees share 99 per cent of the human DNA that determines inherited characteristics in people. And female birds can spot the better of two male songbirds in minutes, while experts take three hours over it! Read on ...
How do Earthquakes Happen?
The shaking of the earth caused by a sudden shifting of rocks below its surface, is called an earthquake. Through a simple experiment understand the process. Read on ...
What is the Secret of the Windmill?
A pinwheel that turns in the wind is fun to play with. But when the wind turns the blades of a windmill, it has the power to pump water and produce electricity! For countries like Holland, the windmill is a big windfall. Read on ...
Why do We Cup our Hands when We Shout?
Have you ever noticed what you do when you have to shout? You cup your hands around your mouth when you shout? Do you know that there is a 'sound' reason behind this gesture? Read on ...
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