<human>:  What is the name of the man who knew infinity in the book ‘The Man Who Knew Infinity Bright, John’?
<bot>: The man who knew infinity was Srinivasa Ramanujan. He was a brilliant Indian mathematician who worked in the early 20th century. He died at the age of 32 from tuberculosis. His work on infinite series was revolutionary and had a profound impact on the development of mathematics.