Is time travel feasible?
Einstein published his Theory of General Relativity in 1915 but it was not until the late nineteen forties that, the Austrian mathematician, Kurt Godel found a time travel possibility within a solution to some relativistic equations. He found, that if the universe is rotating then time travel in both directions should be possible. By both directions, I mean, into the past and back or into the future and back. Alas, recent observational work used to study the cosmic back-ground radiation has indicated that the universe has not rotated significantly since its creation. Hence, time travel into the past would appear to be impossible. However, Einstein’s theory of Special Relativity allows ‘time-dilated’ travel into the future. If an astronaut sets off on a journey travelling at a high percentage of the speed of light, then his on board clock will run more slowly than an equivalent clock here on Earth. Thus, when the high speed traveller returns after a few years of his elapsed time; here o
