Why do periodical cicadas lie dormant for 17 years? What are they doing that whole time? And how do they know it's time to come up? My first children's book: https://neonsquidbooks.com/books/animal-sidekicks/ Bibliography: https://docs.google.com/document/d/1_RGZZryFdAAgF17xDu2Kx-IrrPRgoix4Xx3iO-P_KwQ/edit?usp=sharing