Yellowstone: Top Photos

Geysers, bison herds, and wild landscapes that teach kids the power of nature

Grand Prismatic Spring and Midway Geyser Basin
Grand Prismatic Spring glows beside the steaming pools of Midway Geyser Basin. The color rings are caused by thermophiles — heat-loving bacteria — thriving at different temperatures across the spring's gradient. © Brocken Inaglory, CC BY-SA 3.0, via Wikimedia Commons

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