Science: Anti-Meteor?

One exciting new parlor game among physicists is speculating about antimatter in bulk. The earth contains no antimatter because matter and antimatter destroy each other as soon as they meet. Antiparticles are now being created in the laboratory, but the trick of actually building antiatoms is likely to take a long time (TIME, April 21). Meanwhile, those who cherish the laws of symmetry are considering the possibility of distant anti-galaxies in space. Such weird other worlds, balancing galaxies of ordinary matter in the universe, may well exist.

Last week, in the British publication, Nature,...

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