Nasa’s 2020 rover: Can we finally answer the big question about Mars?

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“So, let’s bring the samples back. So if those extraordinary claims are made, they can be verified.”

One likely extraterrestrial form of life might resemble a terrestrial form: the stromatolite.

They basically look like big rocks. I visited one site in Western Australia in 2003 with a group of Japanese students who were told by a local guide that the stromatolites were “3.5 billion years old.” (They’re not, but they do look like what life might have looked like at that point.”

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So NASA is sending another rover to see if they can find evidence of a similar life form.

Sorry. No Slurm (yet?).

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— Read on www.bbc.co.uk/news/amp/science-environment-51544476