Evidence for bat-like flying mammals appears as far back as the Eocene Epoch, some 50 million years ago; however, the fossil record tracing bat evolution is scanty. Based on similarities of bones and ...

A running vampire bat is weird and awesome. June 21, 2013. By Sarah Kliff. Do you have questions about vampire bats? Well, today is your lucky day: Carl Zimmer has some vampire bat facts for you!