In , follow our intrepid babies into the Mesozoic Era. Experience the different shapes, sizes, and colors of the reptiles that roamed the Earth before us. Plus, learn about how dinosaurs evolved over millions of years until becoming extinct in this simple text written in question-and-answer format. With bright artwork by Emmy Kastner, Nerdy Babies is a series that the very littlest nerds will want to return to again and again. Stay curious. There’s more to learn about everything!