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By soaking a silica sponge with antimatter, physicists have made the first matter-antimatter molecules. In 1979, Floyd Stecker of the Goddard Space Flight Center suggested that the matter-antimatter asymmetry could have arisen spontaneously in the first moments after the Big Bang, swinging one way in some regions of the universe and going the opposite way in other regions. Signs of the new particles showed up when the team scanned data on matter-antimatter differences for clues to other phenomena. |
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