But A Machine That Was Powerful Enough To Accelerate Particles To The Grand Unification Energy Would Have To Be As Big As The Solar System -- And Would Be Unlikely To Be Funded In The Present Economic Climate.

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"But a machine that was powerful enough to accelerate particles to the grand
unification energy would have to be as big as the Solar System -- and would
be unlikely to be funded in the present economic climate."
-- Stephen Hawking "A Brief History of Time"

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