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Matter and Anti-matter After 37 years of looking, physicists have found a second example of the way in which anti-matter behaves differently from matter. The latest finding, from the Department of Energy's Stanford Linear Accelerator Center (SLAC), helps explain why the amount of matter in the universe now dwarfs the amount of anti-matter, even though the Big Bang presumably produced equal quantities of both. NPR's Richard Harris reports.

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Matter and Anti-matter

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Matter and Anti-matter

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After 37 years of looking, physicists have found a second example of the way in which anti-matter behaves differently from matter. The latest finding, from the Department of Energy's Stanford Linear Accelerator Center (SLAC), helps explain why the amount of matter in the universe now dwarfs the amount of anti-matter, even though the Big Bang presumably produced equal quantities of both. NPR's Richard Harris reports.