For more than 50 years, he’s been obsessed with finding a way to return to the past. Specifically, to the Bronx, in 1955. That’s the year his father, Boyd Mallet, died. Mallett’s lifelong mission? To traverse spatiotemporal continuum and warn his dad to take better care of himself. To tell him to kick the two-pack-a-day habit that helped lead to the fatal heart attack he suffered at the age of 33.Fifty-three years later, University of Connecticut professor Ronald Mallett thinks he knows how to build a time machine. Via MeFi.