Physics
See the latest physics news and expert analysis on dark matter, the multiverse, theoretical and particle physics, quantum theory, and more from the world of physics.
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See the latest physics news and expert analysis on dark matter, the multiverse, theoretical and particle physics, quantum theory, and more from the world of physics.
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Atomic clocks are the best timekeepers, but they usually must be kept in a lab to work. Now, they've been used to measure gravity's effect on time in the Alps Â
Some of the first machines ever built to emit X-rays have been given a taste of their own medicine - and these ghostly images are the result