All interpretations made by

All interpretations made by a scientist are hypotheses, and all hypotheses are tentative. They must forever be tested and they must be revised if found to be unsatisfactory. Hence, a change of mind in a scientist, and particularly in a great scientist, is not only not a sign of weakness but rather evidence for continuing … Read more

When Arthur Ashe plays

When Arthur Ashe plays tennis, his purpose each day is to play the game in a way he has never played it before. It may be a backhand he uses, one that he may never have used before in that circumstance. His play is a fresh integration of his world at the instant of action. … Read more

[On Richard P. Feynman\’s

[On Richard P. Feynman’s live demonstration of the rigidity of the O-rings when cold that doomed the space shuttle Challenger, killing seven astronauts:] The public saw with their own eyes how science is done, how a great scientist thinks with his hands, how nature gives a clear answer when a scientist asks her a clear … Read more

Walking the streets of

Walking the streets of Tokyo with Hawking in his wheelchair … I felt as if I were taking a walk through Galilee with Jesus Christ [as] crowds of Japanese silently streamed after us, stretching out their hands to touch Hawking’s wheelchair. … The crowds had streamed after Einstein [on Einstein’s visit to Japan in 1922] … Read more

I don’t think you

I don’t think you can pump carbon dioxide into the atmosphere indefinitely and not have a reaction. But there are great scientists such as Freeman Dyson, one of the greatest physicists of the last hundred years, who has studied the question, who believes quite the opposite. The reason transnational action is so difficult is because … Read more