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Scientist reveals the hidden damage caused by seemingly harmless nature activity: 'I never thought of this'
Rock cairns can negatively affect animals and the environment in a range of surprising ways. Scientist reveals the hidden ...
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If you see these, push them over, Yosemite National Park says
Rock cairns are man-made piles of rock stacked on top of each other. According to park rangers, Leave No Trace ethics states that when recreating in wilderness spaces, […] advertisement ...