An entertaining, fact-packed introduction to the science of night. What happens when we go to sleep at night? Kids can find out in this fun exploration of the world after dark. This nonfiction book covers the surprising amount of activity going on at night with animals, plants, celestial objects and even our own bodies! Here are answers to all the questions kids have about nighttime—and many they have never thought of!—including: Why do we dream? How do bats use echolocation? What blooms in the moonlight? Why do stars twinkle? There's so much here to investigate, kids will be up all night!