So many extinction-level events happened in ancient times, it is a wonder anything survived. These the ones that killed the ...

Mississippi has changed over millions of years and everything from sea monster to dire wolf fossils can be found here.

Imagine a crocodile built like a greyhound—that's a sebecid. Standing tall, with some species reaching 20 feet in length, ...

These sebecids were the last survivors of a group of ancient crocodile relatives called Notosuchia. Unlike today’s crocodiles ...

Scientists have discovered that the long-extinct megalodon ... only warm-blooded marine animals. Others include aquatic mammals such as whales, dolphins, seals, sea lions, walruses and manatees.

All of that went into decisions to create a report card that sticks ... the time they were the subject of a “Cousteau” episode – California sea otters were nearly extinct, prompting lawmakers to ...

No, dire wolves are not “back.” But pretending they can be brought back is a good excuse to gut regulations that protect real endangered species.

Many marine creatures like ammonoids and conodonts went extinct, as well as land animals ... The planet was warm, and sea levels were high. As a result, large landmasses were flooded with seawater.

But that’s not true. Megalodons are extinct. They died out about 3.5 million years ago. And scientists know this because, once again, they looked at the teeth. All sharks – including megalodons – ...