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“This is where time travel can are available and it’s scientifically accurate and there are real-world repercussions from that,” says Emma Osborne, an astrophysicist on the University of York, within the UK. Let’s start with Albert Einstein’s theories of relativity, which set out a description of house, time, mass and gravity. Could we ever construct a time machine and travel into the distant previous, or forward to see our great-great-great-grandchildren? Answering this question requires understanding how time actually works – something physicists are removed from certain about. So far, what we will say with confidence is that travelling into the …