Fossilized Evidence of Tumor in 255-Million-Year-Old Extinct Mammal Relative The tumor, a compound odontoma, is common to mammals today. But this animal lived 255 million years ago, before mammals even existed.
Paleolithic Humans May Have Hunted Cave Lions Into Extinction, Fossils Hint Scientists speculate that early human hunting of cave lions, perhaps as part of ritual activities, might have been a factor in the animals' extinction.
Extinct Beardogs Found Hiding in Museum Collections Scientists reclassify two fossil specimens found in Texas.
New Large Prehistoric Shark Discovered Researchers found fossilized teeth of a newly identified fossil shark, Megalolamna paradoxodon, that lived about 20 million years ago.
These Vintage Travel Posters Invite You to “Meet the Dodo” and “Walk with the Moa” Extinct, but not forgotten.
It Can Take Over 12 Years for Endangered Species to Get Listed for Protection The listings come too late for some of the most imperiled species.