❖ Antihyperhydrogen-4, Heaviest Antimatter Hypernucleus Ever, was discovered recently.

❖ It contains 1 antiproton, 2 antineutrons, 1 anti-Lambda hyperon.

❖ This antihyperhydrogen-4 decays when it is only a few centimetres away when it is trapped by an anti-Lambda hyperon.

❖ The newly discovered antihyperhydrogen-4 was produced at the Relativistic Heavy Ion Collider (RHIC) in the United States.

❖ Antiparticle is a subatomic particle that has the same mass as another particle and equal but opposite values of some other properties.