Some extinct animals are neither dinosaur nor mammal. Learn about trilobites and other extinct life in this section.
When we think venom, we think cobras and vipers. But Euchambersia was a reptile, a mammalian ancestor, and venomous, according to new fossil analysis.
This insect's appearance and characteristics are so unusual, it has received its own scientific order.
A small island off the coast of Alaska supported a mammoth population until sea levels rose and fresh water sources shrank.
The mysterious aquatic creature lived 300 million years ago, and its fossils have stymied scientists for more than 50 years. New research solves some of the mystery.
Centuries later, the flightless bird is finally getting some cred.
More than 100 years after the last quagga died, scientists in South Africa are using selective breeding to bring it back.
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.
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.
A mysterious wild horse called the tarpan eluded hunters for centuries until succumbing to extinction. What made it special?
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.
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.
Although it may be long extinct, this quirky bird continues to amaze scientist. The latest discovery? An awesome “musket ball” weapon located on the tip of its wing structure. Could our world once again include this big, old flightless pigeon?