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.
What Was the Biggest Dinosaur? Here Are the 4 Best Estimates
Utahraptor: The Salty Saga of a Killer Dinosaur
Nigersaurus: The 'Mesozoic Cow' With More Than 500 Teeth
There Were No Flying Dinosaurs, Only Flying Reptiles
All About the Megalodon, Shark Giant of Prehistoric Times
Meet Palaeophis Colossaeus, the Largest Sea Snake of All Time
Real Life 'Jurassic Park'? Scientists Work to Bring Back Extinct Thylacine
Once Thought Extinct, the Tasmanian Tiger May Still Be Prowling the Planet
Dodo Birds: Maybe Not Complete Dummies After All
Learn More / Page 2
Scientists generally agree that dinosaurs sported colorful, feather-like plumage. So do moviemakers lack imagination, or do audiences?
By Chris Opfer
The method this ancient carnivore employed is unlike anything we see in predators today.
The character of King Louie gets a serious primate upgrade in the new Disney live-action-meets-CGI film. Did the ape also serve as inspiration for sasquatch and yeti?
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Centuries later, the flightless bird is finally getting some cred.
By Robert Lamb
Both of these massive prehistoric creatures belonged to the same family, but they're actually very different species.
Grizzly bears are usually associated with colder climates, so you might be surprised to learn that they've also called Mexico home.
The basic idea of "Jurassic Park" — minus the carnage — is both appealing and approaching reality. But reintroducing extinct species requires some careful consideration.
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A lot of prehistoric animals were massive, but do we really know why? And is there a larger animal roaming the planet today?
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?
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.
By Chris Opfer
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.
By Marie Look
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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.
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?
Learn more about the top 10 most mysterious creatures to disappear from the earth.
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.
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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."
A full grown Allosaurus could be up to 34 feet long, stand 9 feet tall and weigh around 3 tons. This dino was a monster who, scientists suspect, would even eat his own kind.
By Mark Mancini
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.
By Mark Mancini
Brachiosaurus has been portrayed in popular culture many times, but the representations of this mysterious dinosaur are largely based on another massive dino called Giraffatitan brancai.
By Mark Mancini
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Supersaurus was a dinosaur that truly deserved its name. It measured about 100 feet in length and lived in North America. This dinosaur lived on a diet that consisted mostly of chutes and leaves from the tops of trees.
The 1964 discovery of Deinonychus in southern Montana was groundbreaking for many reasons, mostly because it helped prove that birds are direct descendants of dinosaurs.
By Mark Mancini
Dinosaurs became extinct at the end of the Cretaceous Period. How and why is a puzzle that paleontologists are trying to solve by studying fossils and rock formations. Learn more about the different extinction theories.
Interest in dinosaurs soared to new heights in the 1990s, thanks largely to the blockbuster film Jurassic Park. So too did dinosaur discoveries. Since 1990, more than 100 new dinosaur genera have been described and named. Learn more about recent dinosaur discoveries.
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Since it was named in 1979 by John Horner and Robert Makela, Maiasaura has become one of the most famous dinosaurs. It has provided information about how it cared for its young and the early development of dinosaurs. Learn more about the Maiasaura.
The Velociraptors in "Jurassic Park" were roughly the size of humans. In reality, they were about the size of an average turkey.
By Mark Mancini