Quantum physics once shocked scientists by revealing that particles can behave like waves—and now, that strange behavior has ...

Physicists in Japan have, for the first time, observed quantum interference in a beam of positronium — a short-lived atom made of an electron and its antimatter twin, the positron. The experiment ...

Positronium shouldn't last long enough to be interesting. It's an "atom" assembled from an electron and its antimatter twin — ...