Theodor Geisel, better known as Dr. Seuss, was born in 1904 in Massachusetts. He attended Dartmouth College where he became editor-in-chief of the humor magazine, first signing his name as "Seuss." He went on to study at Oxford where he met his first wife Helen. After returning to the US, he pursued a career as a cartoonist. During World War II, he created animated films and then began illustrating children's books. His first book, "And to Think That I Saw It on Mulberry Street," was rejected 27 times before being published. Dr. Seuss wrote 44 books before dying in 1991.