Science & Mathematics Questions & Answers

Bats are not blind. Like many animals, they are born blind, but gain eyesight from the time they are seven to nine days old. Bats are night creatures. They come out only at night to hunt. Although they can see reasonably well they have no special eyesight possessed by other night creatures like the cats and owls. Instead, bats fly …

It depends what you mean by dangerous! Certainly, not all snakes are poisonous, and of those which are, only a very small number are dangerous to people. But in the same way that people could be said to be a danger to the things they eat, snakes are dangerous to their prey. Most snakes kill their prey- rats, mice and …

The definition of a deserts is a place where the lack of moisture makes it impossible for anything but a few special life forms to grow. This applies not only to hot places, like the Sahara and the Gobi deserts, but also to very cold places too. Because all or most of the moisture there is turned to ice, almost …

When the first manned satellites went into space in the early 1960s, many people felt that the wildest dreams of science fiction writers were coming true. It was only about 50 years earlier that the first aeroplanes had flown. What amazing progress had been made in half a century! But in the next 20 years events moved still faster In …

Amazing facts about animals — A captive, great brown bear of Alaska, a close relative of the fabled grizzly bear, weigh about 650 kilograms! The female Emperor penguin comes to the land, lays one egg on bare ice, then immediately returns to the ocean. The male keeps the egg warm for two months until it hatches, by rolling it onto …

During World War I a metallurgist called Harry Brearley tried mixing chromium with steel to make a stranger gun barrel. It didn’t work. The barrel shattered. But the metal pieces he threw away outside stayed bright and didn’t rust. Quite by accident, the secret of making stainless steel had been discovered.