Imagine if you could stick out your tongue and lick your belly button. Turns out that would be an easy feat for a frog if they actually had belly buttons. A frog's tongue is one-third of its body ...

Beelzebufo ampinga, the so-called "devil frog," may be the largest frog that ever lived. These beach-ball-size amphibians, now extinct, grew to 16 inches (41 centimeters) in length and weighed ...

Glass frogs, native to Central American rainforests, have lime green skin, but their transparent bellies reveal their internal organs, earning them the name ‘glass frogs’. Glass frogs are ...

Researchers know frogs were hopping around as far back as 217 million years ago. But exactly how and when they evolved to begin as tadpoles remains unclear. The oldest-known tadpole fossil found ...