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Yellowstone National Park
For Teachers
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![Upper Geyser Basin Hydrothermal Features on a Winter Day. Upper Geyser Basin Hydrothermal Features on a Winter Day.](https://webarchive.library.unt.edu/web/20090115024304im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/YELL_thermal.jpg) |
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Did You Know?
Yellowstone contains approximately one-half of the world’s hydrothermal features. There are over 10,000 hydrothermal features, including over 300 geysers, in the park.
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Last Updated: May 22, 2008 at 13:49 EST |