When you and I take a deep breath, we pull air into our lungs. That’s because humans are mammals. But fish aren’t mammals. They usually don’t breathe air. They usually don’t have lungs. That’s what I ...

Imagine you're a Japanese eel, swimming around just minding your own business when—bam! A predatory fish swallows you whole and you only have a few minutes to make your escape before certain death.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. When you’re a ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Some teenage Japanese eels have found a way to avoid becoming a fish ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The human outer ear may have arisen from ancient fish gills. | Credit: A. Martin UW ...

Some slimy sea creatures have a very strange way of escaping predators, even after they've been swallowed. Baby Japanese eels have been spotted escaping from the stomachs of fish that have eaten them ...

The middle ear of humans evolved from fish gills, according to a study of a 438 million-year-old fossil fish brain. Scientists discovered the fossil of the braincase of a Shuyu fish. Despite its skull ...

Humans' outer ears may have evolved from the gills of prehistoric fish, a new study finds. Gene-editing experiments indicate ...

Scientists have traced the evolutionary origin of humans' outer ears to the gills of ancient fish through a series of gene-editing experiments. When you purchase through links on our site, we may earn ...