The Boy Who Loved Math

Most people think of mathematicians as solitary, working away in isolation. But that wasn't what Paul Erdos did. At the age of four, he could ask you when you were born and then calculate the number of seconds you had been alive. But he didn't learn to butter his own toast until he turned 20. Instead, he traveled around the world, collaborating on an astonishing number of projects and changing the way people everywhere thought about math.