The Next Web NYC - Luis Von Ahn, Duolingo
COUNTLESS HOURS OF MINDLESS ACTIVITY POWERING A REVOLUTION
When he was 12 years old, Luis von Ahn came up with a plan to make gyms free. People exercising on machines can generate electricity, he figured, and that energy is valuable. So why not eliminate gym fees, hook all the machines to a power grid, and sell the wattage produced to a major electric company? While that idea didn’t pan out, his two companies Captcha and reCaptcha (sold to Google for an undisclosed amount) did.