Ancients Greeks believed earthquakes were caused by giants fighting underneath the ground. There are over 900 different types of bats and they can all fly. The Vampire bat has less teeth than the other bats because it doesn't chew its food. It lives on the blood of mammals. Bats do not need to see when they fly, they use sound to help them figure out where they are going.
Bats always turn left when exiting a cave.
Our body has some natural protection for our eyes . Our eyelashes help to keep dirt out of our eyes. Click here to know more about eyes Hundreds of years ago, rockets were invented in China. The first rockets were shaped like arrows and they were not very powerful. The power of early rockets came from gunpowder.