Duolingo was the fun, brave company we loved that taught us languages. Today it is sinking in the stock market
Most people never manage to turn their ideas into business successes. Luis von Ahn (Guatemala City, 1978) has achieved it twice. The first, when he created reCAPTCHA and sold it to Google in 2009 for a small fortune. The second, years later, started from a much simpler concept. Learning languages was a painso von Ahn … Read more