<human>:  Where does the title come from in the book ‘A Brief History of the World’?
<bot>: The book is a history of the world from the Big Bang to the present. The title is a play on the title of the book, "A Brief History of Time" by Stephen Hawking. The book is a little shorter than "A Brief History of Time" by Hawking, so the title was chosen to make it sound a little less long.