Continental Drift
This animation explains continental drift and shows how continents on moving tectonic plates drift slowly across the Earth's surface.
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Video
Formation of Islands Over Hot Spots
This animation shows how volcanic islands form over hot spots arising from deep within Earth's mantle.
Formation of Islands Over Hot Spots
Video
How Do We Know the Age of the Earth?
This video explains the chemistry and science behind how we know how old the Earth is. Geologists have deduced the age of the Earth thanks to a handful of radioactive elements. With radiometric dating, scientists can put an age on really old rocks—and even good old Mother Earth. This video describes how scientists date rocks.
How Do We Know the Age of the Earth?
Video
Oxygen Isotopes
This animation explains how periods of glaciation and deglaciation alter the balance of oxygen isotopes found in seawater.
Oxygen Isotopes
Video
Plate Tectonics
This animation explains how heat and pressure from Earth's interior cause tectonic plates to move.
Plate Tectonics
Video
Why This Town Has Been On Fire For 50 Years
In 1962, an underground fire started in the coal-mining town of Centralia, Pennsylvania. Fifty-three years later, that fire still burns. This video explains the history and science behind the Centralia mine fire. Does anyone still live there? How could the fire keep burning for so long, and why hasn't it been extinguished? From a chemical standpoint, what is fire, anyway?
Why This Town Has Been On Fire For 50 Years