Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick ...

In a remarkable development that challenges our understanding of life’s origins, researchers have identified human-like DNA ...

Humans are damaging the planet at an unprecedented rate and raising risks of abrupt collapses in nature that could spur disease, deforestation or "dead zones" in the seas, according to an ...

The model suggests that in a billion years, Earth will lose its oxygen, and with that, humans will cease to exist.

We’re living in a weird time on Earth: a period when our planet has ice. Amid persistent and frequent record heat, it may be surprising to hear that Earth is currently relatively cool — at least in ...