In a new study, researchers used X-ray imaging to peer inside the frogs' heads, finding they use their mouth cavities to amplify sounds that travel to the inner ear through connective tissue.

For example, they might keep the frog’s mouth open, or briefly fill it with moistened cotton balls to see if they can still hear.

In 1983, the world lost one of its weirdest frogs. The gastric-brooding frog, native to tiny portions of Queensland, Australia, gave birth through its mouth ... a beard and glasses and that's ...

But when northern glass frogs wake up and hop around in search of insects and mates, they take on an opaque reddish-brown color. “When they’re transparent, it’s for their safety,” said ...

The glass frog’s unusual adaptation to bolster its camouflage could offer clues for preventing deadly blood clots in people. By Veronique Greenwood At first glance, you might miss the glass frog ...

The amphibians are at the mercy of mining operations that are destroying their ecosystems, but local communities throughout South America are fighting back In Ecuador, a glass frog from a new ...