Tyler believes that if time travel were possible, it would be policed or regulated to prevent bad actors from changing history.
Brian believes that Hawking's time travel conjecture is a different explanation for why we're not overrun with tourists from the future.
What type of time travel is in A Christmas Carol? Neil deGrasse Tyson and comedian Chuck Nice answer fan questions on time travel, paradoxes, and wormholes with theoretical physicist, Brian Greene. Did Ebenezer Scrooge get pulled through a wormhole?