Theoretical physicist Ronald Mallett poses for a photo as he prepares to pour dry ice into a ring laser in a lab at the University of Connecticut. Mallett says he kept his work on time travel secret for years partly because colleagues might conclude he was a crackpot.
Theoretical physicist Ronald Mallett poses for a photo as he prepares to pour dry ice into a ring laser in a lab at the University of Connecticut. Mallett says he kept his work on time travel secret for years partly because colleagues might conclude he was a crackpot. Scott Eisen Bloomberg
Theoretical physicist Ronald Mallett poses for a photo as he prepares to pour dry ice into a ring laser in a lab at the University of Connecticut. Mallett says he kept his work on time travel secret for years partly because colleagues might conclude he was a crackpot. Scott Eisen Bloomberg

Theoretical physicist’s obsession: Building a time machine to see his dad

April 26, 2015 04:00 PM