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Luis von Ahn

Founder and CEO of reCAPTCHA and Duolingo

Pittsburgh, PA, USA
Mark_zandi

Mark Zandi

Chief Economist of Moody's Analytics; Co-Founder of Economy.com

Pennsylvania, USA
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Julie Gerberding, MD

Infectious Disease Expert; Former Director of the U.S. Centers for Disease Control & Prevention (CDC)

Pennsylvania, USA
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Jeremy Siegel

Finance Professor & Author

Pennsylvania, USA
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Martin Seligman

Zellerbach Family Professor of Psychology & Director of the Positive Psychology Center at the University of Pennsylvania

Pennsylvania, USA
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