The organic molecules could come from life or from ordinary chemistry — only samples returned to Earth can settle it.

Scientists have found a hidden biosphere stretching miles beneath Earth’s surface and as deep as 6 miles below the seafloor.

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth.

Researchers have looked at how particular microbes from Earth would fare in conditions like those of Mars, the moon, and the ...

There are "vast hidden magma systems" inside of Mars, scientists say – and it could have major implications for the search ...

An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

NASA’s Perseverance rover has uncovered the most extensive evidence yet of complex organic molecules on Mars, detecting ...

A new study into the 3I/ATLAS interstellar comet points to it having been born as far back as 12 billion years ago in a very ...

Photos of amazing, almost unreal places Who needs fantasy? Earth is full of “alien planets” and surreal beauty beyond ...

The Marvel Universe has a rich history, with some of its secrets taking ages before their truth was discovered.