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Bubbles popping in the hot particle soup that filled the early universe may have created a rumble like thunder, and it is possible that we can detect the echoes today. Finding them could help solve some mysteries of the Higgs boson and maybe lead to new physics.

The Higgs is credited with giving most other particles mass. Physicists hope that it won't behave as predicted, because oddball antics would give clues to new physics beyond the standard model, our best description of the known particles and forces.

One way to test Higgs theory is to listen to the sky, says David Weir at the University of Helsinki in Finland. "When the Higgs field was turning on everywhere and giving the other particles mass, that could have been a very violent time in the early universe," he says.

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