Rebecca Cober (@rebeccacober) tweeted at 8:57 AM on Mon, Jun 03, 2013:
Makes me feel better about typing CAPTCHA words. Duolingo: The Next Chapter in Human Computation: http://t.co/d7BUvSCtb2 via @youtube.
(https://twitter.com/rebeccacober/status/341584383213441024)
Get the official Twitter app at https://twitter.com/download