"Zooming Out in Time" is the title of a FORA TV presentation concerning global warming. The presenter is John Baez a mathematical physicist working on quantum gravity using the techniques of "higher-dimensional algebra." A professor of mathematics at the University of California, Riverside, he enjoys answering physics questions on the usenet newsgroup sci.physics.research, and also writes a regular column entitled This Week's Finds in Mathematical Physics. The talk is one hour and twenty minutes long but Doctor Baez presents this subject with a magnificent dry wit and although not in his scientific field does quite well with it. I give the talk a "thumbs-up".
Plant this in the url: http://fora.tv/2006/10/13/Zooming_Out_in_Time#fullprogram
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