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

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

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The surface of Mars, as ...

Fifty years ago, NASA’s Viking missions to Mars made groundbreaking attempts to detect life on the Red Planet. While the missions initially returned negative results, a new study published in the ...

The redemption of Viking: Did the 50-year-old mission to Mars find life or not? How NASA’s 1975 mission to Mars led to decades of scientific controversy and confusion over the existence of life on ...