If true, the idea would blow past one of physics’ most sacred limits: that parallel versions of reality can never talk to each other. And if information could leak between outcomes, it could mean ...

According to legend, in July 1954, a man arrived at Haneda Airport, Tokyo, carrying a passport from a country called Taured — a place that didn’t exist. The document appeared genuine, stamped with ...

A man once appeared with documents, memories, and knowledge that seemed to come from a world almost identical to ours—but not ...