Speciation and extinction are the twin engines that have sculpted the diversity of life on Earth. Speciation, the process by which new species arise from ancestral populations, is driven by a mixture ...

Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” event ...

Mass extinction sounds scary, but it’s basically nature’s biggest reset button. Throughout Earth’s history, there have been five major events where huge numbers of species disappeared quickly, and ...

The end-Permian mass extinction was the deadliest event in Earth’s history. Also called the Great Dying, it is thought to have nearly wiped out all life on Earth 252 million years ago. Yet, earlier ...

(CNN) — Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” ...