(CNN) — For some, happiness is getting enough sleep. But for a small marsupial in Australia, sex is a higher priority than getting some shut-eye — and it is willing to sacrifice hours of it daily to ...

The Lion King got one thing right: love is in the air on the savanna. From the birds perched in the trees to the foxes curled in their den, plenty of these grassland creatures are monogamous and mate ...

Joel Berger receives funding from Colorado State University and the Wildlife Conservation Society. Fatal attractions are a standard movie plotline, but they also occur in nature, with much more ...

Splashes at the surface give an indication of the commotion below. Beneath the waves, a tornado of hundreds of devil rays swirl in a dizzying dance that goes on for hours. "It's amazing to see a ...