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

The desert rain frog is nocturnal and uses the nighttime hours to dig in the sand and eat moths, beetles, ants, and insect larvae. It’s unusual among frog species for two reasons.

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 ...