How a mysterious particle could explain the Universe’s missing antimatter
Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current theories, matter and its counterpart, antimatter, ought to have been created in equal amounts at the time of the Big Bang. But antimatter is vanishingly rare in the universe. So what happened? Physicists don’t know the answer to that question yet, but many think the solution must involve some subtle dif