It’s tough being a frog. You have to account for opposing lanes of traffic across a busy highway and, if you get through that, you have to hop across logs and the backs of turtles, avoiding alligators ...

The see-through amphibians have an amazing strategy for hiding while asleep—one that could advance our understanding of blood clotting. The organs and developing eggs of a female glass frog, ...

Glass frog photographed during sleep and while active, showing the differences in red blood cells within the circulatory system. Jesse Delia via AMNH When a tiny glass frog dozes off to sleep, its ...