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

Perhaps we admire the vulnerability of an animal butt because we do our best to hide our own. One of the cutest butts in the natural world undoubtedly belongs to the desert rain frog. It’s small, ...

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 ...