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.
It isn't hard to imagine the world full of dinosaurs, even though these extinct animals haven't walked the earth for millions of years. Learn all about dinosaurs, including early dinosaur discoveries, dinosaur fossils, and dinosaur extinction. See more »
Learn about birds that are no longer living, from the earliest species, Archaeopteryx, to more modern species like the Moa. See more »
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. See more »
Some extinct animals are neither dinosaur nor mammal. Learn about trilobites and other extinct life in this section. See more »
Some people believe that dinosaurs were relatives of today's birds. But, you might ask, if that's so, why didn't they have feathers? Funny you should ask.
Ornitholestes is a dinosaur that is noted for using its hands to grasp its prey. Each of the fingers had razor sharp claws. The animal weighed about 35 pounds and grew to a length of about 6 feet.
Protoceratops andrewsi was discovered in Mongolia in 1922 by an expedition from the American Museum of Natural History led by Roy Chapman Andrews. Its genus name means "first-horned face," and its species name was in honor of the expedition's leader.
