Richard Feynman on the uncertainty of knowledge - video

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Dr. Richard Feynman was one of the greatest minds America ever produced. It's rare that a physicist must develop his own mathematics to explain his physics, but that is what Professor Feynman did. A brilliant and yet very practical man. The interview with him that showed on PBS back in the 1980's from the BBC Interview was probably THE best interview with a scientist that I've ever watched (and it's not because I was in Physics grad school at the time either!).