The ancient Chinese thought they were magical dragons. Some old-time scientists thought that because they were so big, all they could do was float in water. Boy, were they wrong! Even today, once-common notions about dinosaurs are being revised as new discoveries are made. This lively book about the perennially popular subject of dinosaurs offers fascinating insight into how certain theories were formed, and then how those theories were proved or disproved. It demonstrates that scientific thought is as creative as it is logical and invites budding scientists to come up with their own ideas.

Some people used to think that Earth was smack-dab in the middle of the universe, with all the stars and planets held in the sky by giant glass balls. Boy, were they wrong! In this follow-up to the award-winning Boy, Were We Wrong About Dinosaurs!, Kathleen Kudlinski and John Rocco look at the mistakes, mishaps, and creativity that are part of scientific discovery. From the first humans wondering about the night sky to the demotion of Pluto to dwarf planet status, this book is an entertaining and informative look at how scientific theories change over time.