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Light travels so fast it can make the transatlantic journey between London and New York more than 50 times each second. With speed like that, you might wonder why there’s any interest at all in finding faster-than-light communication. But there is.

With the vast distances between objects in deep-space, even messages travelling at the speed of light take an appreciable time to arrive. The bad news is that it’s impossible to send communications any faster without breaking established laws of physics – but the good news is that some workarounds have been suggested, which hold the tantalising promise of allowing for faster-than-light, or “superluminal” communication.

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