(CNET) — Stephen Hawking seems to have turned into the man with the sandwich board that says: "The end is nigh."
Not only has he warned us that aliens might destroy us, but he's also been worrying that artificial intelligence might do the same.
Now he's perceiving a threat that might not merely put an end to Earth, but to the whole Universe.
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As the UK's Sunday Times reports, Hawking is worried about the God particle. This, discovered by physicists during experiments within CERN's Large Hadron Collider, is a vital ingredient to explaining why things in our world have mass.
However, in a preface to a new book called "Starmus" -- a collection of lectures gives by famous scientists and astronomers -- Hawking worried that the Higgs Boson might become unstable.