There is a possibility that we live in a universe dominated by antimatter
We first created positrons, electrons’ antimatter counterparts, in 1932. But it took decades to create more antiparticles. Now, the newly-discovered antihelium-4 could help us figure out whether there are vast pockets of antimatter in our universe. Specifically, researchers at the Brookhaven National Laboratory’s Relativistic Heavy Ion Collider were able to observe 18 antinuclei of helium-4…