Paleontologists have uncovered a previously unknown prehistoric mammal species that was among the largest of its time. The partial remains of the newly identified species were originally collected ...

Discovered in Colorado, a new prehistoric mammal species that lived during the age of the dinosaurs may have been a swamp-dweller. A team of paleontologists found the fossils near Rangely, Colorado, ...

For some mammals, the evolutionary path to gigantism after the dinosaurs’ demise wasn’t always a straight road. Species of extinct, hefty, rhinoceros-like creatures called brontotheres evolved into ...

Thunder beasts were among the first mammals to truly live large. The biggest of these rhino-like creatures, called brontotheres by experts, stood taller than eight feet at the shoulder and weighed ...

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‘It is amazing to imagine these giant flying squirrels gliding over rhinos and mastodons living in the forests of Tennessee.’ By Andrew Paul Published Feb 26, 2025 3:02 PM EST Get the Popular Science ...

Pantolambda bathmodon, a stocky, now-extinct mammal, lived 62 million years ago and reached roughly 92 lbs in adulthood, which was a much larger size than most mammals that came before. Video credit: ...

Many giant animals roamed the Earth after non-avian dinosaurs went extinct. Illustration by Emily Lankiewicz / Dmitry Bogdanov via Wikipedia under CC BY-SA 3.0 / Dmitry Bogdanov via Wikipedia under CC ...