CNN: NASA Discovery Reveals There May Have Been Life on Mars

'News from Mars,' CNN reported Friday. 'Not just that water was there, perhaps millions of years ago, but also these organic compounds.'

In an interview with the head of Earth Sciences collections at the UK's Natural History Musem, CNN asked the million-dollar question. 'How much more likely, if you believe so, that that makes it that there was life on Mars at some time.'

A: So what we've found with data that's come back from the Rover and has been studied over the last few months is that we see igneous rocks -- so these are rocks that have been formed through volcanic processes -- which have also been affected by the action of liquid water.

And that's really really interesting and exciting, because liquid water is one of the key ingredients you need for life to start. So if you've got the chances of life ever being on Mars, you'd need to have somewhere that had liquid water for at least a period of time. And we've got good evidence for that.

Now that's combined with the fact that we're seeing, using instruments like SHERLOCK, which is an instrument that I'm involved with, also the presence of organic molecules. And organic molecules are chemical molecules made of the elements carbon, hydrogen, oxygen, nitrogen, sometimes bits of sulfur, sometimes bits of phosphorous, and maybe some added-up things. And those are really really important, because you need organic molecules for life to start.

And the other thing that's really interesting about organic molecules is they can actually be sort of fossil chemical evidence of potential past life.

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