20130712_ted_02.mp3?orgId=1&topicId=1019&d=512&p=57&story=191620023&t=progseg&e=197986218&seg=2&ft=nprml&f=191620023
Part 2 of the TED Radio Hour episode Why We Collaborate.
About Luis Von Ahn's TEDTalk
Computer programmer Luis von Ahn wondered how else to use small contributions done by millions on the Internet for greater good. He put CAPTCHAs, those online puzzles to verify you're not a robot, to work by digitizing books and teaching foreign languages.
About Luis Von Ahn
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