Albert Einstein’s theory of relativity changed everything by tying together space and time into one concept: space-time.65 Einstein famously predicted that moving clocks run more slowly. If you take a trip to a nearby star by traveling close to the speed of light, you will experience less time than those left back on Earth. This doesn’t mean that you feel time moving slowly, like in The Matrix. It means that people and clocks back on Earth will measure more time passing than the clocks on your spaceship. We all experience time the same way (at the normal one-second-per-second rate), but our
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