Bill Gates Reveals What Makes Him Feel 'Pretty Stupid'

He's known as a genius in his field but Bill Gates has one big regret.

During a Reddit "Ask Me Anything" session today, the global philanthropist said his one big regret in life has been not learning a foreign language.

"I keep hoping to get time to study one of these -- probably French because it is the easiest," Gates said. "I did Duolingo for a while but didn't keep it up. Mark Zuckerberg amazingly learned Mandarin and did a Q&A with Chinese students -- incredible."