For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...

here are the animals that get my vote for “most prehistoric-looking.” They may not be the oldest animals on Earth, but they aren’t recent creations either. Most of all, when you look at them ...

Scientists still debate the purpose of this dinosaur's iconic horns and spiky head plate. Find out what we’ve learned about how Triceratops lived and why it went extinct. Triceratops’ enormous ...