Probing the antiworld

Half a century since the discovery of the antiproton, and more than 70 years since that of the positron, researchers at CERN can routinely produce millions of antihydrogen atoms. Mike Charlton and Jeffrey Hangstexplain how these remarkable anti-atoms could be our best bet for understanding one of the most fundamental symmetries of nature.

M. Charlton, and J. S. Hangst, Physics World, October, 22 (2005)