Inevitably humans – or our evolutionary descendants, whatever they choose to name themselves – will have to leave Earth to survive. We would have to settle on a different planet, in a different system, possibly in another galaxy. But the vastness of space means that such a system might be thousands of light years away. Even if we could travel close to the speed of light, the sheer distances make the journey seem unfeasible, bordering on impossible. But what if nature has ways for us to circumvent space, and even time?

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