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time machine

At the BBC: Still working on that ol’ time machine…

From the BBC: Albert Einstein thought the three dimensions of space were linked to time – which serves as a fourth dimension. He called this system space-time, and it’s the model of the Universe that we use today. But Einstein also thought it was possible to fold space-time, creating a shortcut between two distant locations. This phenomenon is called a wormhole, and it can be visualised as a tunnel with two openings, each emerging at different points in space-time. Wormholes might exist naturally in the cosmos; indeed, scientists in Russia are trying to use radio telescopes to detect them. But using wormholes for time travel won’t be straightforward. Indeed not. Unless everything is absolutely determined, some wise person from the Read More ›