Lee Smolin thinks that time is real. If that strikes you as unusual, you haven’t spent much time with theoretical physicists, who tend to think that the passing of time is either an emergent property of the universe, or, perhaps, an illusion.
“Some of my colleagues suggest that time is an approximate description of the universe,” Smolin, a theoretical physicist at the Perimeter Institute, writes in Time Reborn. “A description that is useful on large scales but dissolves when we look too closely. Temperature is like this.” The reason that some physicists have rejected time, he argues, is that they have mistaken mathematical [...]