Robert Ballard

Connecticut College, 2007

If you can reach the top of a mountain in just an hour or a day, it wasn’t worth your time to climb.

Photo: Frederick M. Brown/Getty Images

Read the speech at digitalcommons.conncoll.edu
Tagged: Don't give up Inner voice

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Robert Krulwich

University of California, Berkeley, 2011

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Sanjay Gupta

University of Michigan, 2012