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It's lucky you're here. But for a series of incredible coincidences and roads not taken, your life could be very different. The same goes for reality. We live in just one of many possible worlds. In others, dinosaurs still rule the Earth, the Russians got to the Moon first, time flows backwards and everyone is vegetarian.

And that's just for starters. What if the laws of physics were different? If we really did live in a multiverse? If robots became smarter than us? If humans were wiped off the face of the planet?

Join New Scientist on a thrilling journey through these and dozens of other incredible but perfectly possible alternative realities, thought experiments and counterfactual histories -each shining a surprising and unexpected spotlight on life as we know it.