Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big.

To fight Lyme disease, you need more than one line of attack. At Université de Montréal's Faculty of Veterinary Medicine, ...

A scientist has discovered a whopping species of rat that measures more than 2.5 feet long - three times the size of a brown ...