Methuselah is the oldest person mentioned in the Bible, said to have lived to be 969 years old. It may not be quite that ancient, but a primitive creature living in a San Francisco museum, named after ...

Before the dinosaur age, the coelacanth — a hefty, mysterious fish that now breathes with its gills — sported a well-developed lung, a new study finds. This lung likely helped the fish survive in ...

How do fish breathe underwater and the differences between gills and lungs. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Like humans, fish ...

A 66 million-year-old fossilized lung from a previously unknown species of ancient fish, as large as a great white shark, has recently been uncovered in Morocco. Researchers believe the fish was a ...

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 ...