It is very important for young people keep their sense of wonder and keep asking why.

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Estoy convencido de que los humanos necesitamos dejar la Tierra para evitar correr el riesgo de ser aniquilados.

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Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.

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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 special.

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Look up at the stars, not down at your feet.

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I think the human race has no future if it doesn't go into space.

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Scientific discovery may not be better than sex, but the satisfaction lasts longer.

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Aristarchus suspected that this was the case and believed that the stars we see in the night sky are actually nothing more than distant suns.

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associates and collaborators were Roger Penrose

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What I have learned from life is to make the most of what you have got.

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