The STAR Collaboration, an international team of scientists using the STAR detector at Brookhaven National Laboratory’s Relativistic Heavy Ion Collider (RHIC), has announced the first observation of an antimatter hypernucleus, antihyperhydrogen-4. Published in Nature, the research describes the hypernucleus, the heaviest antimatter hypernucleus found to date. It is composed of an antiproton, two antineutrons, and…