The answer to how the woolly rhinoceros became extinct may have just been found in the stomach of one of its fiercest ...

The findings, published in the journal Genome Biology and Evolution, show that woolly rhinos remained "genetically healthy" until the end of the last Ice Age. Scientists say the species therefore ...

Koalas with the bodies of lions. Elephants the size of your dog. Gigantic, 8-foot-tall sloths. These aren’t creatures found in science fiction: They walked our planet a million years ago, during the ...