I am Luis von Ahn, co-inventor of CAPTCHA & reCAPTCHA, Founder/CEO of Duolingo, MacArthur Fellow and computer science professor. AMA!
Hello Reddit! This is Luis von Ahn. I’m from Guatemala. A while ago, I invented CAPTCHAs, those squiggly, annoying letters you have to type all over the Internet to prove that you’re a human. Sorry about that!
After selling my second company to Google in my 20s, I decided to dedicate my life to making education accessible to everyone in the world. In 2011, I co-founded Duolingo, a free and fun way to learn languages, which has since become the most downloaded education app in the world. There are more people learning languages on Duolingo in the US than there are people learning languages in the whole US public school system.
Some cool stuff: