How did life begin on Earth? While scientists have theories, they don't yet fully understand the precise chemical steps that ...

The prospect of life existing beyond Earth has captured the imagination of people for centuries. Aliens serve as the basis for some of the most entertaining radio shows, television programs, and ...

This article is a summary of Roy Ratcliffe’s recently released book ‘Life on Earth’ (Past, Present and Future)’. Of all the millions of species of life that have existed on earth over billions of ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. We’ve pieced together a remarkably detailed timeline of ...