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Lisa Randall — physics professor, theoretical physicist, and expert in elementary particle physics and cosmology — interviewed by Charlie Rose (PBS) on her new book, Knocking on Heaven’s Door: How Physics and Scientific Thinking Illuminate the Universe and the Modern World:

http://www.charlierose.com/view/content/11893

Here’s something she said that I really liked: “Every fact you have comes with uncertainty… You understand something only if you understand the uncertainty of what you are saying.”