* Astronomy

The question of whether quantum mechanics is correct could soon be settled by observing the sky and there are already tantalizing hints that the theory could be wrong.
Antony Valentini, a physicist at Imperial College, London, wanted to devise a test that could separate quantum mechanics from one of its closest rivals - a theory called Bohmian mechanics. Despite being one of the most successful theories of physics, quantum mechanics creates several paradoxes that still make some physicists uncomfortable, says Valentini.

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