You know the feeling. It’s getting close to bedtime, you get sleepy, and you start yawning automatically. You may even find ...

Butts are everywhere, but there’s something about animal behinds that drive people nuts. Be it their odd, anachronistic look ...

Many scientists believe the red-eyed tree frog developed its vivid scarlet peepers to shock predators into at least briefly questioning their meal choice. These iconic rain-forest amphibians sleep ...