Add Yahoo as a preferred source to see more of our stories on Google. NASA's Viking landers were the first spacecraft to successfully touch down on the surface of Mars. NASA/JPL-Caltech via AP Finding ...

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 ...

As the search for life on Mars continues – with promising potential biosignatures identified last year by NASA at the Bright Angel formation – there are a few scientists out there who think we may ...

Dr. Joel S. Levine is a consultant and subject matter expert for the NASA Engineering and Safety Center in the areas of space and planetary environments. Dr. Levine worked for NASA from 1970 to 2011 ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Joel S. Levine, William & Mary (THE CONVERSATION) Finding life beyond the Earth would ...