Extinct Animals

Extinct animals are those species which are no longer living. This group includes prehistoric animals like dinosaurs and ice-age mammals, as well as moden species like the Dodo.

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How the Quagga, an Extinct Zebra Sub-species, Is Being Revived

More than 100 years after the last quagga died, scientists in South Africa are using selective breeding to bring it back.

Fossils of Ancient Filter-feeding Fish Discovered in Colorado

The bony fish measured more than six feet long and ate prey using a filtering system similar to that of animals today.

Meet Dracoraptor, the 200 Million-Year-Old Dinosaur Just Discovered in Wales

Amateur fossil hunters discovered a new carnivorous dinosaur called Dracoraptor hanigani on the beaches of Wales.

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

The extinction of ice age megafauna and the disappearance of their mammoth-sized poop allowed pumpkins to become what they are today.

Angry Vegetarian Saber-toothed Mammals Were Fighters Not Lovers

Scientists discover male animals flashed sabers far longer than first thought.

Were iguanodon's thumbs murder weapons?

Iguanodon continues to perplex us. Across the vastness of evolutionary time, she gives us a double thumbs-up. We just don't know if we should run or throw her a ripe mango.

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

Both of these massive prehistoric creatures belonged to the same family, but they're actually very different species.

Is the Mexican grizzly bear extinct?

Grizzly bears are usually associated with colder climates, so you might be surprised to learn that they've also called Mexico home.

Should we bring extinct species back to life?

The basic idea of "Jurassic Park" — minus the carnage — is both appealing and approaching reality. But reintroducing extinct species requires some careful consideration.

How did passenger pigeons become extinct?

Centuries ago, people didn't just sit on park benches and feed pigeons bread -- they ate the birds, too. Needless to say, passenger pigeons did not respond well to humans' voracious appetite.

Why were so many prehistoric animals so big?

If you've been curious about why dinosaurs and other prehistoric animals were so massive, know that paleontologists are still on the case.

How were tarpans different from domestic horses?

A mysterious wild horse called the tarpan eluded hunters for centuries until succumbing to extinction. What made it special?

How Pterosaurs Worked

They were creatures of the air, but they aren't part of the avian family tree — and don't call them dinosaurs. What was life like for the pterosaurs, and what has sparked renewed interest in these flying reptiles?

9 Extinct Exotic Sea Creatures

A stunning array of strange and ferocious aquatic beasts patrolled Earth's waters long before they became the stuff of legends and "Jurassic Park" movies. One could eat a great white shark in one gulp.

10 Terrifying Extinct Cetaceans

If you thought sea monsters were just the stuff of myth, you thought wrong. With giant, razor-sharp teeth, ancient cetaceans — the ancestors to modern whales, dolphins and porpoises — make even nightmares seem dull.

How Woolly Mammoths Worked

Hop in your time machine, set the clock back a few thousand years and meet some woolly wonders. They even have a few things to teach us about the fate of modern elephants.

Could You Really Outrun a Tyrannosaurus Rex?

OK, hop in your time machine and go back 67 million years or so to the Cretaceous period. Then find a Tyrannosaurus rex and challenge it to a race. Sounds crazy, huh? Could you really outrun a Tyrannosaurus rex?

Top 10 Extinct Animals

Learn more about the top 10 most mysterious creatures to disappear from the earth.

How Megalodon Worked

The megalodon was born as big as an adult great white and grew to weigh as much as 7 Tyrannosaurus rex. Learn all about the megalodon.

Dinosaur Encyclopedia

It isn't hard to imagine this scene even though dinosaurs haven't walked the earth for millions of years. Dinosaurs have captured our imaginations. These dinosaur articles have been written to lead you into the exciting world of dinosaur research and back to the "Age of Dinosaurs."


Allosaurus was the most powerful, fearsome is and deadly dinosaur of the Late Jurassic. Until the Tyrannosaurus appeared this dinosaur was the largest predator to roam the Earth.

The Big Dinosaur Debate: Is It an Apatosaurus or Brontosaurus?

Apatosaurus was a huge sauropod from the Jurassic period. And there's a debate that's been raging for decades about whether its genus should cancel out the Brontosaurus entirely.

Meet Archaeopteryx, the Feathered Dino With Wings and Teeth

Fossils of just 12 individual Archaeopteryx, a winged dinosaur that live during the Jurassic, have ever been found. Aside from the rarity, what else makes this unique dinosaur so special?


The Brachiosaurus is a unique dinosaur because of the placement of the nostril openings, which were slightly above the eyes. Its front legs were longer than the rear, which made it able to eat the leaves from high tree branches.