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9th Annual Smithsonian Magazine Photo Contest Natural World
These bison in Yellowstone National Park obviously don't know about the danger of walking on potentially thin crust but we humans are warned of it over and over and over again. "Stay on the boardwalks

These bison in Yellowstone National Park obviously don't know about the danger of walking on potentially thin crust but we humans are warned of it over and over and over again. "Stay on the boardwalks!"

Photo Detail
Date Taken: 06.2011
Date Uploaded: 10.2011
Photo Location: Wyoming, United States of America
Camera: SP320
Copyright: © Ruth Frye