

In Cave-land Ohio, 500,001 BC, the tribal leader of Cave-land, Big Chief Goppernopper, forces Gak, the older sister of Ook, to marry him in order to keep Ook and Gluk from bothering him. George and Harold claimed that "scientists won't discover that until 2073." Then they made "the world's first book based on science facts". They also revealed that they have a time machine, and been time traveling to the future and past, discovering lots of evidence that scientists did not have knowledge about, including dinosaurs and cavemen living at the same time.

They said that scientists make theories based on evidence they discovered, and that every day, all sorts of evidence are being detected. Nonetheless, George Beard and Harold Hutchins disagree with this. He then explained that he should know about it, since he was a recipient of "The Most Brilliantest Science Guy of the Whole Wide World Award" in 2003, a reference to the seventh Captain Underpants book. Sneedly, stating that the book "contains many scientific errors and stuff." He said that dinosaurs and cavemen did not live at the same time, as dinosaurs lived 64 million years before cavemen. The book starts with a scientific disclaimer by professor Gaylord M. 1.6 Chapter 6: Two Wongs Don't Make it Right.1.5 Chapter 5: The Terror of the Mecha-saurs.1.2 Chapter 2: The Goppernoppers Strike Back.
