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Keplers Conjecture (30 Oct 2003)
Johannes Kepler experimented with different ways of stacking spheres. He concluded that the "face-centred cubic lattice" was best. Using this method, Kepler calculated that the packing efficiency rose to 74%, constituting the highest efficiency you could ever get. But, how to prove it?
Article URL: http://www.bbc.co.uk/radio4/science/another54.shtml
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