These antiheroes of the American West are actually not so bad. New research reveals they're good parents and neighbors, and ...

Also known as the Polynesian tree snail or niho tree snail, the Partula snail (Partula nodosa) is actually one of several snail species of the genus—all of which are in danger of extinction.

Here’s how the ancient frogs compare to those of today. Tadpoles and adults of the extinct frog species Notobatrachus degiustoi (illustrated) lived in temporary ponds in what is the Patagonia ...