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

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

NASA wants to send an ambitious fleet of helicopters to soar through Martian skies—but scientists fear the endeavor could ...

A large neutral response can indicate several things. Scientists may judge the evidence genuinely inconclusive. They may hold an intermediate level of confidence. Or they may regard a claim as too ...

Nasa's latest Mars discovery brings us closer to finding alien life. Perseverance has found deep deposits of complex carbon ...

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

NASA astronaut Anil Menon spoke with Newsweek's Leonardo Feldman about life in space, recently declassified UFO sightings, ...

Perseverance identifies organic carbon molecules in rocks on riverbed that carried water billions of years ago ...

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

NASA has officially lost a decade-old Mars orbiter that performed vital scientific and communications work at the Red Planet. The Mars Atmosphere and Volatile Evolution (MAVEN) mission, which launched ...