There Are Two Types of Time Travel, and Physicists Agree That at Least One of Them Is Possible
Brian Greene, professor of physics and mathematics at Columbia University and co-founder of the World Science Festival, explains what we know about time travel so far. Following is a transcript of the video. Brian Greene: I’m Brian Greene, professor of physics and mathematics at Columbia University and co-founder of the World Science Festival. It’s critical that you realize that there are two types of time travel, and they are radically different. Time travel to the…