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.

San Francisco-based inventor and speaker Lucas Rizzotto has built a virtual reality “time machine” that allows him to relive his past. And while “time machine” is, of course, just a moniker, ...

Like a lot of kids in the ’80s, Matt Kline loved the movie “Back to the Future.” “I was enthralled by it,” says Kline, now a 33-year-old Sugar Creek police captain. “The thought of being able to time ...

Mike Keslosky uses Time Machine, and wants to shift his Photos and iTunes libraries from his startup volume to an externally connected hard drive. But he’s concerned that after he moves those ...