AFAIK, anti-hydrogen is very stable on its own and only gets annihilated because it quickly comes in contact with matter. > In November 2010, the ALPHA collab

AFAIK, anti-hydrogen is very stable on its own and only gets annihilated because it quickly comes in contact with matter. > In November 2010, the ALPHA collaboration announced that they had trapped 38 antihydrogen atoms for a sixth of a second, the first confinement of neutral antimatter. In June 2011, they trapped 309 antihydrogen atoms, up to 3 simultaneously, for up to 1,000 seconds. https://en.wikipedia.org/wiki/Antihydrogen https://en.wikipedia.org/wiki/Antihydrogen