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Conan O'Brien presents at the 2014 Breakthrough Prizes
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Conan O'Brien presents at the 2014 Breakthrough Prizes Awarded in Fundamental Physics and Life Sciences Ceremony at NASA Ames Research Center on Dec. 12, 2013 in Mountain View, Calif. (Credit: Getty Images / Steve Jennings)

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Conan O'Brien

Photos of late night talk show host Conan O'Brien through the years.

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