Sixty years ago, cars and airplanes were still deathtraps waiting to happen. Today, both are safer than ever, thanks in part to one pioneering air force doctor’s research on seatbelts and ejection seats. The exploits of John Paul Stapp (1910&nd...

Can two particles become inextricably linked, so that a change in one is instantly reflected in its counterpart, even if a universe separates them?  Albert Einstein's work suggested it was possible, but it was too bizarre, and too contrary to ho...