Warren Goldstein is the history department chair at the University of Hartford and the author of books including Playing for Keeps and William Sloane Coffin: A Holy Impatience.
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'You have changed my life' is a common refrain in the emails Walter Lewin receives daily from fans who have been enthralled by his world-famous video lectures about the wonders of physics. 'I walk with a new spring in my step and I look at life through ph... SEE MORE