Luis von Ahn is an entrepreneur and computer science ... He is known for co-inventing CAPTCHAs, being a MacArthur Fellow and selling two companies to Google in his 20s. He is currently the co ...

But when Gates offered Luis Von Ahn, the cofounder of language learning ... Von Ahn is a recipient of a MacArthur Fellowship, also known as a "Genius Grant." He created captcha, the ubiquitous ...