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

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

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

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

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

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

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

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

ADVERTISEMENT ADVERTISEMENT Breaking News Intern Original Saturday Night Live cast member Garrett Morris, 89, has reacted ...

Scientists say extraterrestrial life may exist elsewhere in the universe, but vast distances, enormous energy requirements and Earth's unique environment make alien visits to Earth highly unlikely.

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.