From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Here’s what you will learn when you read this story: Abiogenesis—the emergence of life from nonliving organics—is the leading theory regarding how life spawned on Earth, but it is being questioned.

A new study used mathematical formulas and demonstrated that it’s highly unlikely life began on Earth. Instead, the researcher points to panspermia, a theory that life or the ingredients for life came ...

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...

It's the oldest question on Earth. Where did we come from? Some people may thank a creator from above, but what if the hand that created humanity wasn't divine? What if aliens brought life to Earth?