Researchers at Cern, home of the Large Hadron Collider have trapped antimatter atoms for the first time.

(They formed 38 stable atoms of antihydrogen which lasted about two tenths of a second each. For each basic particle of matter, there exists an anti-particle with the same mass but the opposite electric charge, but when a particle and its anti-particle collide, they are “annihilated” in a flash of energy, yielding new particles and anti-particles. Physicists believe that the Big Bang should have produced equal amounts of matter and its opposite, but no one knows what happened to all the antimatter. The word “annihilated” makes me think that’s a good thing.)