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Nasa's Mars rover Opportunity has found slivers of a bright material that looks very much like it is gypsum (calcium sulphate).

Virphen wrote: I am so über at modesty I kick their modest arses at it.



"The other waters... were probably very acidic - pH of five, four, three. Gypsum doesn't require that, and so this may hint at a kinder, gentler chemistry of the water for life."

trubble76 wrote:If that rover doesn't represent awesome value for money, I don't know what does.
Hoorahs all round!


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