LONDON (AP) — Did creation need a creator?

British physicist and mathematician Stephen Hawking says no, arguing in his new book that there need not be a God behind the creation of the universe.

The concept is explored in “The Grand Design,” excerpts of which were printed in the British newspaper The Times on Thursday. The book, written with fellow physicist Leonard Mlodinow, is scheduled to be published by Bantam Press on Sept. 9.

“The Grand Design,” which the publishers call Hawking’s first major work in nearly a decade, challenges Isaac Newton’s theory God must have been involved in creation because our solar system couldn’t have come out of chaos simply through nature.

But Hawking says it isn’t that simple. To understand the universe, it’s necessary to know both how and why it behaves the way it does, calling the pursuit “the Ultimate Question of Life, the Universe, and Everything.”