Just for fun

LASERS PROVIDE ANTIMATTER BONANZA
A research team used lasers to produce more positrons
(anti-electrons) inside a solid than any previous experiment,
according to the researchers involved. In the 13 March Physical
Review Letters, the team describes firing short pulses from an
intense laser onto thin gold targets and creating a high-density
positron source that could be used to investigate exotic phenomena
near black holes or supernovae.

Hui Chen et al., Phys. Rev. Lett. 102, 105001

COMPLETE Focus story at http://focus.aps.org/story/v23/st8