Kissing Numbers
Additional information
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Sphere trilogy: http://bit.ly/Sphere_Trilogy
More Dr James Grime on Numberphile: http://bit.ly/grimevideos
Strange Spheres in Higher Dimensions: https://youtu.be/mceaM2_zQd8
Earthquakes and Spheres: https://youtu.be/2vnqSwWAn34
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