A rare fossil fish scan reveals brain features and adaptations tied to the transition from aquatic to land animals.

Have you ever caught a glimpse of a waterbird attempting to swallow a huge fish whole? If so, you might have wondered how in the world it would be able to swallow or even digest a fish that large, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Some types of sea ...

When you think about human evolution, there’s a good chance you’re imagining chimpanzees exploring ancient forests or early humans daubing woolly mammoths on to cave walls. But we humans, along with ...

When winter settles in with prolonged periods of frigid temperatures, wildlife must adapt to survive the severe changes. What happens to fish when winter’s icy grip covers lakes and streams with ice ...

3D rendering of the tiktaalik, an extinct walking fish. Dotted Yeti/Shutterstock When you think about human evolution, there’s a good chance you’re imagining chimpanzees exploring ancient forests or ...

Antarctica may seem like a desolate place, but it is home to some of the most unique lifeforms on the planet. Despite the fact that land temperatures average around -60°C and ocean temperatures hover ...

In the fascinating underwater world, gender is far from fixed. Many aquatic animals can change their sex, a unique biological process known as sequential hermaphroditism. This natural adaptation ...

Discover 25 bizarre deep sea adaptations you won't believe! Explore creatures with transparent heads, bioluminescent lures, ...