This theory is borne out by the (rather freaky) fact that clocks on the space shuttle-whether internal clocks or atomic clocks placed aboard for experimental purposes-run more slowly than reference clocks on Earth.
An outgrowth is something known as “time dilation,” which suggests that time can move at different rates for different observers-and therefore at different rates in different places.
The possibility of time travel stems from Albert Einstein’s theory of special relativity, which, loosely speaking, describes the relationship between space and time. The truth is that it is easier, theoretically speaking, to travel forward in time than it is to travel backward, and that’s partly because we’re all moving forward in time naturally. You likely don’t realize it, but when you’re done reading this article, you will have traveled perhaps 90 seconds into the future.
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