When we think of the age of dinosaurs, we often picture huge reptiles like Tyrannosaurus rex or long-necked dinosaurs ...

Imagine a world where furry mammals scuttle under the feet of gigantic dinosaurs, not yet destined to rule the Earth. It’s a mind-bending thought: the creatures we call mammals, including humans, have ...

After dinosaurs went extinct, South America was dominated by large, crocodile-like reptiles called sebecids. Measuring up to ...

The creatures cruised the world’s oceans with features we often associate with marine mammals, such as coats of blubber and ...

Knife-toothed reptiles called sebecids went extinct on the mainland 10 million years ago. New fossil evidence puts them on an island 4 million years ago.

Many groups of insects and mammal-like reptiles disappeared. The trilobites (a type of marine arthropod whose closest living relative is the horseshoe crab) were totally wiped out having been on ...

(Yes, even dolphins.) But in the churn of natural selection, some mammals ended up with appendages that look like they should be found on a reptile, bird, or insect. That’s convergent evolution ...

Alligators can live on land and in water, but that doesn't mean they can breathe underwater like fish. But how long can alligators stay underwater? And how long can they hold their breath? Let’s find ...