Despite this incredible length of time they still look much like their fossil ancestors.
Bats are the only mammal that is truly capable flight.
Bats are gentle mammals and will typically bite only if frightened or provoked. Many species are social and some have even been known to care for each other's young. The smallest mammal in the world is the Bumblebee bat from Thailand, which weighs less than a penny. The largest bats are the flying foxes, one of which has a six foot wing span. Bats eat a large variety of foods.