Albert Einstein: genius, humanitarian; wild of hair, sad of eye. He was untidy, generous, concerned, and absent-minded, the prototypical absent-minded professor. He was one of the founders of modern physics and a scientist most extraordinary; his laboratory was mostly a blackboard. Like Newton before him, Einstein's inspired theories led the way to much of today's technology, contributing basic principles to our understanding of molecular construction, atomic physics, time, space, and much more. He was a humorous, idiosyncratic, and curiously naive man of conscience, yet one of the greatest scientific geniuses in history.