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nuclear energy

The protons and neutrons of an atom release nuclear energy when they break apart. Every atom contains a lot of energy. The forces that hold the atom together are the strongest forces that scientists know of. ... read more

inside a serpent

No legs? No problem! Check out the science beneath the snakeskin. ... read more

space exploration

Humans have always had a need to explore. In ancient times, people could study only the places where they lived. They could only wonder about the rest of the world and what might exist in the universe. Over the years, new technologies developed. With improved modes of transportation, we could explore ... read more

galaxies

A galaxy is a system of dust, gas, and stars that collects over a very large area. Gravity binds the objects in a galaxy together. Within each galaxy are billions of stars. ... read more

people who study the earth

Throughout history, people have always wanted to understand the planet we live on. They wanted to know why the weather changes from hot to cold and back again. They wanted to know why it rains or snows and what lightning and thunder are. They wanted to know why volcanos erupt and why earthquakes move ... read more