A terrible secret - Earth.com A terrible secret

Yellowstone National Park is an amazing place to experience nature, a message pushed hard nowadays by local firms in their bid to attract tourism. Brochures promoting the park have, for example, painted it as an area that’s never been influenced by human beings. In truth, though, that idea papers over a horrifying secret. Photo credit: Daniel Mayer/Wikimedia Commons | CC BY-SA 3.0

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