The Cat in the Hat Knows a Lot About That! follows the adventures of 6-year-old best friends, Sally and Nick, as they are whisked off on extraordinary voyages of scientific discovery with the Cat in the Hat. In this volume, children will learn the answers to questions like what causes day to change into night, why do we sneeze, and what makes our heart beat. We learn about why animals ears come in many shapes and sizes, how different animals carry their babies, who are the fastest creatures in the world and why male crickets chirp, what feathers are used for and more.