In 1877, an Italian astronomer mapped faint lines on Mars and called them canali, meaning channels or grooves. But the word ...

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

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

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 ...

Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the ...

NASA's Swift Observatory is in peril. A last minute mission to save it could make spaceflight history. Here's everything to ...

Deep beneath the Atlantic, an alien-like lost city of towering chimneys offers clues to life on Earth and other worlds.

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

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

For decades, the question of whether life exists beyond Earth has been the domain of science fiction writers and late-night ...