He was born in Springfield, Massachusetts, in 1904.
His real name was Theodor Seuss Geisel.
As punishment for an illegal drinking party, Dartmouth College forced Theodor Geisel to give up his extracurricular activities. He took the pen name "Seuss" to keep writing for the college humor magazine.
Dr. Seuss was a cartoonist for "The Saturday Evening Post" before he spent 15 years creating advertising slogans for Standard Oil.
His first attempt at publishing a book "And to Think That I Saw It on Mulberry Street" was rejected 27 times before it was finally published.
His big break was writing and illustrating the "The Cat in the Hat."
During his career as an author, Dr. Seuss wrote and illustrated 44 books for children.