My ultimate research goal is to transform our human existence to just eating, sleeping, drinking, playing - nevermind.

[Captchas] are not only annoying, but they kill 10 seconds of your time.

People are good at figuring out what's attractive, and computers are good at quickly searching and finding. You put them together, and bang!

It's hard to think of a time when I'm not working, but when that is the case, I like to travel and eat good food.

I finished reading High Output Management by Andrew Grove, which had such valuable insights for leaders that I've been forcing managers at Duolingo to read the book.

If you get asked to do something that would take place down the road (say you get asked to speak at a conference that's a year away) and you wouldn't want to do it if it were taking place next week, then don't do it. This advice has helped me evaluate the opportunities that I truly want to dedicate my time to and those that I don't.

The current business model for language education is the student pays — in particular, the student pays Rosetta Stone $500. The problem with this business model is that 95 percent of the world’s population doesn’t have $500.