Millions of years ago, a giant meteorite killed all of the dinosaurs. Find out how! Will humans all be killed the same way? Find out what we can do. Is there life on the planet Mars? Scientists think maybe the answer is yes. Find out why. Then read a scary story about what might happen, Doom From Space.
Discover the biomes of our planet, from lush rainforests and sweltering deserts to deep oceans and fast-flowing rivers. See how seasons and climates vary across the globe, and find out about amazing animal and plant adaptations. Learn about people who live in different places around the world and the dangers that threaten our natural environment.
Learn about the kind of resources Earth holds, and how they are extracted and used. Discover the problems and challenges posed by human consumption of these resources, from overfishing to dwindling supplies of fossil fuels. Read about the efforts being made to protect Earth's resources, including finding sustainable energy solutions and making our cities eco-friendly.
Discover what earthquakes are and how they are caused. Find out how scientists measure earthquakes, and what makes some earthquakes so much more destructive than others. Read about some of the most serious earthquake disasters in history, and how people can be better prepared in the future.
Explore mountains around the world, and find out how they are created. Discover what happens when mountains experience erosion and how climate and biomes change with elevation. Find out about the people, plants, and animals that live at high altitudes and the risk of deadly avalanches.
Learn all about the water cycle, the amazing process that keeps water moving around our planet. Simple explanations and diagrams show how water evaporates from the ocean, gathers as clouds in the sky, and falls as rain. Read about the natural places on Earth where water collects and is stored, and how important the water cycle is to human life.
Learn about population in countries around the world, and how changes in the number, age, and gender of people living in a place affect life there. Explore different settlements, from ancient towns to sprawling, modern cities. Find out why and where people migrate, and discover how we can protect our planet from the risks of overpopulation.