Discusses the scientific aspects of the planet Mars, including its topographical make-up and the possibility that it may contain water and living things.

Discusses the discovery of Neptune as well as its topography and the search for water and life.

"Most of the time, hail occurs as tiny pellets not much bigger than gravel or sand. But when the conditions are right, hailstones can be as big as golf balls or even baseballs! They crack car windshields, take down power lines, and even injure people outside when they fall. Readers learn lots of cool science about not just how hail forms, but what conditions need to exist for hail to be destructive. Full-color photographs emphasize just how big hailstones...