Known as griffinflies, prehistoric dragonflies were around before the dinosaurs, 300 million years ago. They are thought to look extremely similar to modern dragonflies, but on a massive scale.

These colossal creatures, with males weighing up to 13 metric tons, were the largest land mammals of their time, dwarfing modern elephants (weighing 6.8 metric tons on average). Their remains are ...

Isolation allows creatures to thrive as their relatives perish due to the threats present on much larger landmasses ...

Preserved in tan stone, the fossil of Mirasaura included much of the ancient reptile’s skeleton and a feather-like fan that ...

A rare, land-dwelling dinosaur relic unearthed in Eastern Oregon in 2015—an ornithopod toe —proves prehistoric creatures roamed the state and represents Oregon’s most significant ancient find.

Travel back in time to the world of “Dinosaurs: Land of Fire and Ice,” the newest exhibition now open at the Upcountry History Museum-Greenville County, a Smithsonian Affiliate and on ...

Archaeologists in Texas recently discovered prehistoric megafauna bones, including a giant ground sloth, during a highway project in Lubbock, according to officials.

Ancient footprints suggest how prehistoric animals behaved in Oregon millions of years ago Tracks found in Oregon's John Day Fossil Beds National Monument 'offer a rare window into ancient ...

In earlier studies, Koch noted that teeth from hippos, which are semi-aquatic, contain more lighter oxygen isotopes than those from such land animals as zebras, elephants and modern rhinos.

Prehistoric giant jellyfish could grow up to three feet wide During the Cambrian period, between 509 and 485 million years ago, giant jellyfish roamed the waters near modern-day central Wisconsin.