Life on Mars

The world's saltiest body of water, hidden away in a dry Antarctic valley, had its portrait taken earlier this year by a NASA satellite.

A debate has long raged among scientists over the possible existence of life on Mars, and a new study is adding fuel to the fire.

The origins of organic matter found by Mars lander missions have long been debated, but a new study suggests a way to find out whether these chemicals of life came from the Red Planet or elsewhere.

A tiny, clay-filled bubble found in a Martian meteorite boosts the chances that Mars was habitable for life.

See stunning photos of Martian meteorites.