Here’s what you’ll learn when you read this story: What we think of as ‘the unknown’ isn’t always some hypothetical wormhole or alternate dimension. A lot of times, the ‘unknown’ is something real, ...

Mr. Cote is an engineering physicist who has worked with superconductors in condensed matter physics labs and particle accelerators and has designed superconducting magnet systems for nuclear fusion.

Some researchers in Korea have made an extraordinary claim that they’ve developed a superconductor that works at room temperature and pressure. It’s getting a lot of attention — and skepticism. A room ...

The video is subtle. A small, regular chip of stonelike material as wide as the end of a ballpoint pen rests on a flat metal surface. But it’s not resting, exactly: While one end touches the metal, ...