Did Viking 1 find evidence of life on Mars? Fifty years after the NASA lander touched down, the jury is still out.

For a world to maintain an atmosphere long enough for life to gain a foothold, it seems it needs to be at least as big as ...

Nearly half a century after NASA’s Viking landers touched Mars, one question shadows their experiments: Did they miss life, ...

The findings could completely change which planets are seen as potential hosts for life.

Half a century after the first successful Mars landing, Viking's greatest legacy may be the questions it taught us to ask.

Microbes on Earth could potentially adapt and become hazardous in the extreme conditions of Mars. These resilient bacteria ...

Terraforming Mars has crossed from science fiction to a structured scientific research agenda, according to a peer-reviewed ...

British scientists have made a major breakthrough in the search for life on Mars, discovering evidence that rivers of molten ...

This Viking 1 image is one of first images of a sunset as seen from the surface of Mars. It shows the Chryse Planitia region ...

Viking 1 landed on Mars 50 years ago, so why haven't we sent people there? Because there are no property rights in space ...

A shattered asteroid may have unleashed a long-lasting cosmic barrage that left scars across the inner solar system and ...

A recent discovery by NASA’s Perseverance rover is giving scientists new insight into Mars’ ancient history and its potential ...