Little Known Facts About Animals    [18-10-2008] - Out of 20,000 species of bees, only 4 make honey. - The katydid has supersonic hearing. It can hear sounds up to 4-5,000 vibrations per second. - Butterflies taste with their hind feet. - Fleas can accelerate 50 times faster than the space shuttle. - Worms can have up to 10 hearts. - Scientists discover as many as 10,000 new species of insects every year. - Cattle are the only mammals that pee backwards. - Cats make over 100 different vocal sounds, while dogs can make about 10. - Cats’ jaws cannot move sideways. Also, cats cannot taste sweet things. - A cat uses its whiskers to determine if a space is too small to squeeze through. The whiskers act as antennae, helping the animal judge the exact width of any passage. - A 544-kilogram horse eats about 7 times its own weight each year. - Chained dogs are 3 times more likely to bite than unchained dogs. - A chameleon’s tongue is twice the length of its body. - Chimpanzees can learn to recognize themselves in a mirror, but monkeys can’t. - A cow gives nearly 200,000 glasses of milk in her lifetime. - A typical Mayfly only lives one day. - The Meganeuron, a prehistoric dragonfly, measured 74 centimeters from wingtip to wingtip. It remains the largest insect in the world. - When a flood sweeps down on tropical ants, they roll themselves into a huge ball which drifts upon the water, with the young safe and dry at the core. - If two flies were left to reproduce without predators for one year, the resulting mass of flies would be the size of the Earth!     출처: 어린이 영자신문 키즈타임즈 (www.kidstimes.net)