Light that crawls

Scientists at Harvard have slowed the speed of light to 38mph using a state of matter proposed by Einstein and Satyendra Nath Bose in 1924.

Based on the theory that atoms crowded close enough together at low temperatures will lose their identity and behave like a single super-atom, it is not until now that scientists have been able to actually put the Bose-Einstein condensate to the test.

Led by Harvard physicist Lene Hau, and reported in the Harvard University Gazette, the experiments are expected to aid research into sending data and laser projection systems.; www.news.harvard.edu/science.