Simon Singh's Numbers - Another Five Numbers - Kepler's Conjecture - ÃÛÑ¿´«Ã½ Sounds

Simon Singh's Numbers - Another Five Numbers - Kepler's Conjecture - ÃÛÑ¿´«Ã½ Sounds
Another Five Numbers
Kepler's Conjecture
Is the 'face-centred cubic lattice' the most efficient way of stacking spheres?