Our planet shakes with over one thousand earthquakes every day. The strongest ones destroy buildings, roads, and lives. They trigger killer tidal waves called t

From ancient times, people have wanted to learn about the sky. The stars, planets, and other heavenly bodies have been observed for centuries, and theories have

The water you drink. The air you breathe. This book you’re holding. Everything around you is made of matter. Learn more about what makes up matter, the forms

Volcanoes literally turn the earth inside out, bringing hot molten rock from deep inside the earth to the surface. Learn more about the spectacular geology behi

Earthquakes can leave people and property in bad shape. At times, they can be deadly. Find out about the science of studying earthquakes and the men and women w