This required abandoning the idea that there is a universal quantity called time that all clocks measure. Instead, everyone would have his own personal time. The clocks of two people would agree if they were at rest with respect to each other but not if they were moving. This has been confirmed by a number of experiments, including one in which an extremely accurate timepiece was flown around the world and then compared with one that had stayed in place. If you wanted to live longer, you could keep flying to the east so the speed of the plane added to the earth
Stephen HawkingWe are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit.
Stephen HawkingThe idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car.
Stephen Hawking