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Lightning in Wyoming Desert

Photo: Lightning strikes above a butte in Red Desert, Wyoming
Prongs of intracloud lightning reach across the sky above a butte in Wyoming's Red Desert. The most common type of lightning, intracloud lightning takes place within a single cumulonimbus cloud.
Photograph by Joel Sartore

Earth Topics

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Photo: Reflection on Yellowstone Lake, Yellowstone National Park

Photo Contest

Share your shots and you could win a trip to the Grand Canyon!

Photo: Puerto Escondido

Interactive Map

Visit Mexico with this interactive map.

Forces of Nature

Photo: A volcano erupting

Guide to the most powerful forces on Earth: earthquakes, volcanoes, hurricanes, and tornadoes.

Six Degrees Book and DVD

Image: Six Degrees DVD and book

Get an eye-opening warning of the dangers of climate change, one degree at a time.