Travel all the way back to the very beginning of life on Earth. When Arnold needs a little extra help with his family tree project, Ms. Frizzle knows exactly how to find the answers. You will jump aboard the Magic School Bus and zoom back in time an incredible three and a half billion years. You will get a front-row seat to watch simple cells slowly transform into sponges, fish, and gigantic dinosaurs. Then, you will see the rise of mammals, early primates, and eventually, the very first modern humans. This epic adventure takes you through the longest class trip in history, exploring the fascinating story of our own species. Along the way, you will discover how life adapted and changed over billions of lifetimes to become the world we know today. Join Ms. Frizzle and the class for a spectacular journey through time that will completely change how you view your ancient ancestors.