Time travel is so dangerous it makes H-bombs seem like perfectly safe gifts for children and imbeciles. I… — John Varley

Time travel is so dangerous it makes H-bombs seem like perfectly safe gifts for children and imbeciles. I mean, what’s the worst that can happen with a nuclear weapon? A few million people die: trivial. With time travel we can destroy the whole universe, or so the theory goes. No one has been anxious to test it.

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