Glass frogs have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday in the journal Science. Ernesto Benavides/Getty Images Now you see them, now you ...

What if you had the power of invisibility, but it only works when you’re asleep? That might be useful for a surreptitious nap in public, but it still probably wouldn’t suit you as well as it does the ...

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, ...

Dec. 23 (UPI) --Researchers say they have solved the mystery of how glass frogs become mostly transparent while they sleep. The discovery may lead to innovations in how to understand blood clotting.