Scientists Crack How Gravity Affects Antimatter: What That Means for Our Understanding of the Universe
A substance called antimatter is at the heart of one of the greatest mysteries of the universe. We know that every particle has an antimatter companion that is virtually identical to itself, but with the opposite charge. When a particle and its antiparticle meet, they annihilate each other—disappearing in a burst of light. Our current understanding of physics predicts that equal quantities of matter and antimatter should have been created during the formation of the universe. But this doesn’t seem to have happened as it would have resulted in all particles annihilating right away. Instead, there’s plenty of matter around us, yet very little antimatter—even deep in space. This enigma has led to a grand search to find flaws in the theory or otherwise explain the missing antimatter. One such approach has focused on gravity. Perhaps antimatter behaves differently under gravity, being pulled in the opposite direction to matter? If so, we might simply be in a part of the universe from ...