"In the preface to a 2014 book, astrophysicist Stephen Hawking wrote he was worried that Higgs boson might turn unstable and lead to the end of everything. The ""universe could undergo catastrophic vacuum decay, with a bubble of the true vacuum expanding at the speed of light,"" Hawking wrote. ""This could happen at any time and we wouldn't see it coming."" Not to worry too much. Hawking added that such a scenario would require a ""particle accelerator that ... would be larger than Earth, and is unlikely to be funded in the present economic climate."""
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