Everyone has regrets, and when something goes wrong in our lives we often wonder what we would do differently if we were able to go back in time. However, what’s really astonishing is that going back in time (as well as going into the future) might actually be possible. Thanks to a number of genius physicists, we now know several theories that show us time travel could be achieved.
The Tipler cylinder is also called the infinite cylinder and is a system that was first proposed by astronomer Frank Tipler. His theory states that there is a cylinder within spacetime that is around 10 times the mass of the Sun, which is rotating and has an infinite length. If a spaceship were to enter this cylinder, it would be able to go back in time.