Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.
Stephen Hawking
More from: Stephen Hawking
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More quotes by Stephen Hawking
- The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza, let alone cooking it.
- Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty.
- I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.
- Intelligence is the ability to adapt to change.
- In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy.