The trick of hiding blood while sleeping appears to be unique to the frogs. “It’s just this really amazing, dynamic form of camouflage,” said White.

The trick of hiding blood while sleeping appears to be unique to the frogs. “It’s just this really amazing, dynamic form of camouflage,” said White.

Can noise help you sleep? It may seem ... a bit gentle (sound) in the background that can make it so you can't quite pick out those noises that are still there." White, brown and pink noise ...

The trick of hiding blood while sleeping appears to be unique to the frogs. “It’s just this really amazing, dynamic form of camouflage,” said White. The Associated Press Health and Science ...