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

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

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

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

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

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

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...

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

Astronomers believe the object, dubbed 'Oumuamua, came from the general direction of the Lyra constellation ...

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

Pyramids, pharaohs and pure pleasure: Four Seasons Cairo at Nile Plaza - Besides it’s ancient giants, Egypt has the brand new ...