"So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist."
"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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Source: Stephen W. Hawking (1990). “A Brief History of Time: From the Big Bang to Black Holes”, Bantam
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