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The story of the drawn-out development of Albert Einstein's revolutionary rewrite of the laws of gravity has been told many times, but over the past 100 years it has given us extreme stars and black holes, expanding universes and gravitational mirages. Einstein also ensured you will never get lost, enabling the technology that helps your phone find your location with pinpoint accuracy!

Despite this scientific bounty, relativity appears to place strict limits on our exploration of Einstein's universe, with any rocketship limited to travelling no faster than the speed of light. With the distance between stars measured in light years, and the distance across galaxies being hundreds of thousands of light years, not to mention the complexities of time dilation, establishing and running a galactic empire is going to be a drawn out and messy affair.

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