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Martian sands

Silica on the Red Planet hints at the possibility of life

1:04pm, May 22, 2008

A region of nearly pure silica on Mars hints at the ancient existence of water, according to a study published in the May 23 Science. The Mars rover Spirit found the silica – the main component in sand on Earth – in the EasternValley of the Gusev Crater more than a year ago.

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