These massive eruptions released vast amounts of sulfur dioxide, blocking sunlight and causing global cooling for a short period of time.

Earth's five great mass extinctions took place, when three-quarters of all living species suddenly disappeared. The wipeout ...

"It brings us into the realm of what humans can grasp," researcher Dennis Kent said. "These events happened in the span of a lifetime." ...

During a 2021 field survey of a construction site located near Ganzhou in southeastern China, six tiny eggs were unearthed ...

Colorado paleontologists found a rare fossil mammal, Heleocola piceanus, from 70-75 million years ago. The discovery shows ...

A new species of fossil mammal about the size of a muskrat, which was found in Colorado, lived during the age of dinosaurs.