Neil deGrasse Tyson – Can We Go Back in Time Using a SpaceTime Machine?
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Astrophysicist Neil deGrasse Tyson explains the details behind backwards time travel. When we were kids we wondered whether we can travel into the future or go back in time using some sort of time machine.
Neil deGrasse Tyson also explains how and why we know we can travel into the future. Special and general relativity, suggest that suitable geometries of spacetime or specific types of motion in space might allow time travel not only into the future but also into the past.
Perhaps the best way to go back in time is to make use of traversable wormholes. Neil Tyson explains all the intricacies of going backwards in time using a wormhole
Another exciting approach for backwards time travel, involves a dense spinning cylinder usually referred to as a Tipler cylinder.
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