SpaceTop 10 physics stories of 2009 The most popular physics stories of the year include a report on an artificial black hole and an investigation into the best way to slice a pizza. 51¶¯Âþ
SpaceUniverse's quantum 'speed bumps' no obstacle for light The prospect that light is slowed by quantum-scale graininess in space-time seems to be fading, thanks to observations by NASA's Fermi telescope 51¶¯Âþ