How a sandcastle reveals the end of all things - Wonders of the Universe - BBC Two
submitted by _angela_
on 05/07/15
1
More about this programme: www.bbc.co.uk/programmes/b00zf9dh Professor 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.
