05/21/2010 11:36 am ET | Updated May 25, 2011

Fermilab Physicists Discover Clue To Why The Universe Exists

It's one of the biggest mysteries of science: Why is our universe made almost entirely of matter and not antimatter?

Physicists at Fermi National Accelerator Laboratory in Batavia say they've uncovered a clue that could help answer that -- and possibly explain why we exist.

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