When Ronnie complains about winter's cold and how our ancestors didn't evolve to better handle the weather, her teacher, Miss Lernin, takes her on a magical adventure to the past to learn about evolution and prehistoric mammals. With not only different continents but also different time periods to touch on, there's a lot to cover, so the two basically discuss one animal for a sentence before instantly moving on to the next one. Though a slower pace may have been nice, this third book in Howard's prehistoric science series provides a great overview of these unusual animals and all the evolutionary changes they went through. Luckily, there are a few great jokes to make the experience more fun and to break up the different sections. Howard's full-color artwork features cartoonish, goggle-eyed humans and wonderfully realistic depictions of these forgotten creatures, all while hilariously capturing Miss Lernin's infectious enthusiasm and oddball humor. A worthwhile and engaging addition to any graphic nonfiction collection.