"Today we are really showing you how we are kind of one step close to answering ... are we truly alone in the universe," Associate NASA Administrator Nicky Fox said during a briefing on the findings ...

NASA’s Perseverance rover has spotted intriguing chemical fingerprints in Martian rock that could hint at ancient microbial life.

Professor Sanjeev Gupta, a planetary scientist from Imperial College London, said: "We've not had something like this before, so I think that's the big deal.