Matter and antimatter should have completely wiped each other out eons ago, leaving the Universe a very empty place.

Why matter dominates over antimatter in our universe has long been a major cosmic mystery to physicists. A new finding by the ...

Physicists have, for the first time, seen a matter particle from the proton family behave in a fundamentally different way from its antimatter twin. The finding — which fits with behaviours ...

Antimatter — the mysterious substance that's the mirror opposite of matter in most ways — falls downward in gravity like everything ... That hypothesis looks more implausible now.