Luis von Ahn is an entrepreneur and computer science professor at Carnegie Mellon University who is known for co-inventing CAPTCHA, being a MacArthur Fellow, and selling two companies to Google in his 20s. He is currently the co-founder and CEO of the popular language-learning platform Duolingo. Luis has been named one of the 10 Most Brilliant Scientists by Popular Science Magazine, one of the 50 Best Brains in Science by Discover, one of the Top Young Innovators Under 35 by MIT Technology Review, one of the 100 Most Innovative People in Business by Fast Company, and was the winner of the 2018 Lemelson-MIT Prize.