What happened to dinosaurs? How big is the universe? Why are oceans salty? Is a meteor going to hit us? Did you know you have enough potential energy inside you to explode with the force of several hydrogen bombs? Bryson invites a younger crowd of seekers on a tour of time, space and science-from the Big Bang and the birth of the solar system to the growth and study of life on Earth. The single-topic spreads are adorned with cartoon portraits of scientists, explorers, and more. A tour of nearly everything for ages 9-12