All of us who study the origin of life find that the more we look into it, the more we feel it is too complex to have evolved anywhere. We all believ…

- Harold Urey

Above all, I regret that scientific experiments-some of them mine-should have produced such a terrible weapon as the hydrogen bomb. Regret, with all …

- Harold Urey

I looked for it [heavy hydrogen, deuterium] because I thought it should exist. I didn't know it would have industrial applications or be the basic fo…

- Harold Urey

Life is not a miracle. It is a natural phenomenon, and can be expected to appear whenever there is a planet whose conditions duplicate those of the e…

- Harold Urey

[My study of the universe] leaves little doubt that life has occurred on other planets. I doubt if the human race is the most intelligent form of lif…

- Harold Urey

Athens built the Acropolis. Corinth was a commercial city, interested in purely materialistic things. Today we admire Athens, visit it, preserve the …

- Harold Urey

I'm in Pittsburgh. Why am I here?

- Harold Urey

[Pure research] is worth every penny it costs.

- Harold Urey