Some experts believe that we're already in a sixth mass extinction event, but given the numbers, others aren't so sure.

Many experts have concluded the planet is in the midst of a mass extinction event — during which large numbers of plant and ...

Extinction rates are not spiraling upward as many believe, according to a large-scale study analyzing 500 years of data.

Fossil evidence from New Mexico shows dinosaurs were still strong, diverse, and thriving before their sudden extinction 66 ...