Editor's note: From a tiny, premature baby born on Christmas day and not expected to survive, Isaac Newton grew into the man who would change the way we understand the universe. He discovered the laws of gravity and motion and invented calculus and, unlike many great thinkers, he was revered in his own time as well as in ours. His flowing hair and anguished face will look great on your screens; bring some enduring brilliance to your desktop today!