How to say no to Bill Gates?

Why Duolingo and CAPTCHA Might Not Have Happened

“A bright young man found himself amidst a country escalating into civil war, but his fascination with mathematics and machines led him to the United States. His name is Luis von Ahn, and he was born in Guatemala in 1978. His childhood wasn’t exactly what one would deem ‘normal’, or ‘average’.

Firstly, his parents owned a candy factory; secondly, he wo…