BBC Two - Wonders of the Universe, Destiny, Entropy and time (original) (raw)
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Entropy and time
Prof Brian Cox builds sandcastles in the Namib Desert to explain why time travels in one direction. It is a result of a phenomenon called entropy; a law of physics that tells us any system tends towards disorder.
Release date:
06 March 2011
Duration:
5 minutes
This clip is from
Wonders of the Universe—Destiny
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