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Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'

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We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very sp...more

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The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a...more

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The role played by time at the beginning of the universe is, I believe, the final key to removing the need for a Grand Designer, and revealing how the...more

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It is not clear that intelligence has any long-term survival value.

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One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without...more

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Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and ...more

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t is generally recognized that women are better than men at languages, personal relations and multitasking, but less good at map-reading and spatial a...more

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Life would be tragic if it weren't funny.

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Stephen Hawking said that his quest is simply "trying to understand the mind of God".

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There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will w...more

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For millions of years, mankind lived just like the animals. Then something happened which unleashed the power of our imagination. We learned to talk a...more

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Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.

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Time can behave like another direction in space under extreme conditions.

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So long as the universe had a beginning, we could suppose it had a creator. But if the universe is really completely self-contained, having no boundar...more