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Short tour 3 - Atacama Desert

Astrobiologist Dr Lewis Dartnell talks from the Atacama Desert about a research trip to find extremophiles that might give scientists some clues as to the kind of life that may exist on the surface of Mars.  Lewis shows how quartz can act as a natural sunscreen to enable cyanobacteria to grow in the dry desert environment.

Running length: 4mins 33s

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• Dr. Lewis Dartnell