"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."
"It is better to travel well than to arrive."Stephen Hawking on Buddha
"Perhaps travel cannot prevent bigotry, but by demonstrating that all peoples cry, laugh, eat, worry, and die, it can introduce the idea that if we try and understand each other, we may even become friends."Stephen Hawking on Maya Angelou
"One travels more usefully when alone, because he reflects more."Stephen Hawking on Thomas Jefferson
"Though we travel the world over to find the beautiful, we must carry it with us or we find it not."Stephen Hawking on Ralph Waldo Emerson
"The World is a book, and those who do not travel read only a page."Stephen Hawking on Saint Augustine
"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."