Video : Luis von Ahn: Massive-scale online collaboration
Internet did erase so many boundaries that otherwise restrict collaboration. And there are other things that we may have never imagined are now possible with the scale only internet can offer.
After re-purposing CAPTCHA so each human-typed response helps digitize books, Luis von Ahn wondered how else to use small contributions by many on the Internet for greater good. At TEDxCMU, he shares how his ambitious new project, Duolingo, will help millions learn a new language while translating the Web quickly and accurately -- all for free.