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May 2020
1h 4m

reCAPTCHA and Duolingo: Luis von Ahn

Guy Raz | Wondery
About this episode
In 2000, Luis von Ahn was starting his PhD in computer science when he attended a talk and happened to learn about one of Yahoo's biggest problems: automated bots were signing up for millions of free Yahoo email accounts, and generating tons of spam. Luis' idea to solve this problem became CAPTCHA, the squiggly letters we type into a website to prove we're h ... Show More
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