Nature may have handed scientists a new clue in a longstanding mystery: how matter beat out antimatter for dominance of the universe. Early data from
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Why does the universe contain so much matter and so little antimatter? Particle physicists have puzzled over that question for 40 years. Now, new mea
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he ancient asteroids seem to have formed some 4.55 billion years ago, making them older than the oldest meteorites ever found on Earth, said Jessica
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