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.

What happens when a curious mind builds a time machine in his backyard? Meet Mike “Mad Man” Marcum, the man who risked it all chasing time travel. This video unpacks his wild experiment, the strange ...