Like HowStuffWorks on Facebook!

Prehistoric Animals

While Mammoths and Saber Toothed Tigers died out long ago, modern mammals are increasingly at risk of extinction due to human intervention. Explore some species that are no longer with us.


Extinct Marsupial Lions Killed Prey in a Really Weird Way

How did the extinct marsupial lion hunt? Learn more about a new study on the Thylacoleo carnifex in this HowStuffWorks Now article. See more »

Meet Gigantopithecus, the Extinct Giant Orangutan in 'The Jungle Book'

In the 2016 Disney version of 'The Jungle Book,' an extinct ape called Gigantopithecus appears. Learn more in this HowStuffWorks Now article. See more »

New Clues to Why Bus-sized Giant Shark Megalodon Went Extinct

Why did giant shark megalodon go extinct? Learn more about a new study of megalodon in this HowStuffWorks Now article. See more »

Fossils of Ancient Filter-feeding Fish Discovered in Colorado

The unusual fossils provide details about bony, bigmouth fish in the genus Rhinconichthys. Learn more in this HowStuffWorks Now article. See more »

Mastodons and Mammoths Gave Their Lives So You Could Have a Pumpkin Spice Latte

With no more ice age megafauna pooping seeds everywhere, pumpkins and squash had to evolve or die. Learn more in this HowStuffWorks Now article. See more »

Angry Vegetarian Saber-toothed Mammals Were Fighters Not Lovers

Scientists found that male animals have been using teeth for longer than thought. Learn more about the history of saber teeth at HowStuffWorks Now. See more »

What's the difference between a mammoth and a mastodon?

Mammoths and mastodons have a few significant differences. Learn more about the difference between the prehistoric animals at HowStuffWorks. See more »

Why were so many prehistoric animals so big?

A lot of prehistoric animals were big, but why? Get the answer at HowStuffWorks. See more »

How Pterosaurs Worked

Pterosaurs were a group of flying reptiles that first appeared on Earth about 215 million years ago. Learn more about the giant pterosaurs. See more »

9 Extinct Exotic Sea Creatures

Extinct sea creatures were exotic as well as ferocious. See this list of 10 extinct sea creatures to learn about the beasts that lived in Earth's waters. See more »