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

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 ...

But what about other animals yawning? In the video above, a cute little rain frog looks ready for bed. It yawns big, but it’s not for the same reason as humans yawn. When a frog yawns ...