"[Misquotation; not by Einstein.] If only I had known, I should have become a watchmaker. [Apparently remorseful for his role in the development of the atom bomb.]"

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Time travel is a terrifying weapon, far more powerful than anything ever before conceived,' he said grimly.'Mankind just isn't ready for that kind of knowledge. We're like children casually playing with an atom bomb.

— Alex Scarrow