Mike Marcum didn’t have a lab, funding, or a PhD. Just a pile of salvaged electronics — and a theory. One night in Missouri, he fired up his homemade device. It formed a vortex. He tossed in a screw.

This “Back to the Future” superfan’s hand-built DeLorean time machine may look exactly like the one from the movie, but it still does need roads. And it recently drove down one that’s considered among ...

Some casting is so perfect you wouldn’t dare imagine anyone else in the role. Harrison Ford is Indiana Jones. Arnold is the Terminator. Brigitte Nielsen is Red Sonja. Eddie Murphy is Axel Foley. And ...