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Positronium is a short-lived system in which an electron and its anti-particle are bound together. In 2007, physicists at the University of California, Riverside created molecular positronium, a brand-new substance, in the laboratory. Now they have succeeded in isolating for the first time a sample of spin polarized positronium atoms.

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"I first conceived of the gamma ray laser in 1963 using nuclear isomers at Cornell and briefly explored the idea with Hans Bethe at the Newman Nuclear Lab. Sharon Weinberger refers to this in her book "Imaginary Weapons." I had just come from a classified laser project at Tech/Ops/Mitre on Route 2 in Boston area in George Parrent Jr's group." - Jack Sarfatti