<human>:  Who was the man who knew infinity?
<bot>: That would be Srinivasa Ramanujan, a mathematician who lived in India in the early 20th century. Ramanujan was a brilliant mathematician, but he was not well educated, so he never went to school. He learned math by reading books and talking to people. He also wrote a lot of mathematics, but he was unable to publish any of his work because of his lack of formal education.