Scientists suggest female frogs listen for changes in the male calls as a signal for when it's warm enough to mate.

Hibernation is a survival strategy employed by a range of animals including rodents, bears, primates and even birds. Here are three of the most unique hibernators, and how they use this strategy to ...

With days starting to get longer and warmer, many creatures are emerging from their winter sleep, ready to find food and restart their normal activities. Photo by Twan Leenders Winter is fading away ...