How Do Fleas Jump?

摘要

If animals could participate in the Olympic Games, fleas would sweep the medal competitions in the long jump every time. The tiny bloodsucking insects can jump 200 times the length of their bodies. To beat that feat, you'd have to leap several city blocks. Scientists have been trying to unlock the secret of the flea's Olympian springiness for centuries. It's a difficult task because fleas are so small and they catapult themselves into the air in just a thousandth of a second.