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.
Triceratops — which literally means "three-horned face" — is one of the most spectacular and well-known of all dinosaurs. It shared the Cretaceous landscape with, and probably was preyed upon by, Tyrannosaurus rex.
The extinct Titanoboa snake lived around 66 million to 56 million years ago. These things were massive and could reach 50 feet long and 3 feet wide making them the largest snake ever to have roamed the Earth.
Constantly compared to the Tyrannosaurus rex, the Giganotosaurus was one of a handful of dinosaurs that rivaled, or possibly exceeded, the creature in size.
On Sept. 7, 1936, Benjamin, the last known Tasmanian tiger, died in captivity at the Hobart Zoo in Tasmania, Australia. But there are those who believe this extinct species still walks the Earth.
Back in the day, the soupy pre-Amazonian waters were filled with beasts like Stupendemys geographicus, a giant turtle the size of a sensible sedan.
The fossilized remains of Simbakubwa kutokaafrika, which means "big lion from Africa," were discovered not once, but twice.
These super-frightening entelodonts (aka hell pigs) once patrolled throughout Eurasia, North America and Africa.
Mid-Jurassic England was teeming with flighted creatures. Now we know it included one pterosaur called Klobiodon rochei.
Lonesome George, the last of his species of tortoises, died in the Galapagos in 2012. But scientists have now finished analyzing his DNA and found some fascinating clues about giant tortoise longevity.
This fin-backed pelycosaur roamed what's now the American Southwest 298 million years ago. And it's by far the oldest-known vegetarian tetrapod with gaps between some of its teeth, which is a big deal.
The battle clearly ended in a slow death for both massive male beasts.
The villainous dinosaur from 'Jurassic Park' probably never had an affinity for water.
A 220 million-year-old turtle fossil discovered in China is the first of its kind ever to be found.
Someone just paid $2.36 million to take home an exquisite dinosaur skeleton. The sale has added to the growing scientific anxiety about the commodification of precious, irreplaceable fossils.
New research suggests the asteroid impact that killed the dinosaurs probably burned Earth's forests, requiring modern birds' common ancestors to live on the ground.
Massive mastodons roamed lower Kentucky during the last ice age. Jefferson was so fascinated by the creatures he was convinced they still roamed the plains in the 1800s.
University of Kansas paleontologists are comparing the bones of a new T. rex to determine if they've got a juvenile Tyrannosaurus or a mature Nanotyrannus on their hands.
Walking evolved not on land but underwater.
Could this exciting find help bridge the gaps between Africa's late Cretaceous fossil record and that of other continents?
The fossilized find provides us with another example of the oldest bird species we know of.
Paleontologists in China hit the jackpot of fossilized pterosaur eggs.
The American Southwest was once prime tyrannosaur country, as a newfound skeleton reminds us.
Scientists are at odds about whether Velociraptors worked together to take down their prey.
A new study found that the Beelzebufo frog had a bite strong enough to take down dinosaurs.
Instead of a mouth, the hell ant had blades and a metal horn to catch its prey. Ouch.
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