SECOND MILESTONE. “In late 2002 the ATHENA project announced that they had created the world’s first “cold” antihydrogen.”
https://en.m.wikipedia.org/wiki/Antimatter
SECOND MILESTONE. “In late 2002 the ATHENA project announced that they had created the world’s first “cold” antihydrogen.”
https://en.m.wikipedia.org/wiki/Antimatter