Earth's history is marked by violent mass extinctions that have shaped life on the planet. Here's how many of these events ...

Life on Earth had to begin somewhere, and scientists think that “somewhere” is LUCA—or the Last Universal Common Ancestor.

The question of life’s origin on Earth has long intrigued scientists, with a growing body of research now suggesting it may ...

A new study dates a Scottish meteorite impact to 990 million years ago, changing the timeline of complex life on Earth.

For decades, people have asked if life ever existed on Mars. The question moved from science fiction to careful science with ...

Last week NASA announced the "clearest sign of life that we've ever found on Mars". Amazing news, or a "crushing blow" for humanity?

New reconstructions of 540 million years of climate history show the planet tumbling between icehouse and hothouse states, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: All life on Earth can be traced back to a Last ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." All life on Earth can be traced back to a Last Universal Common Ancestor, or LUCA. A study suggests that ...