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Scientist reveals the hidden damage caused by seemingly harmless nature activity: 'I never thought of this'
A rock cairn, or rock pile, is described by the National Park Service as "often used to mark hiking routes in parks." But the video from Morticia (@bloodflower) shows the scientist knocking over ...
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If you see these, push them over, Yosemite National Park says
Have you ever passed by a rock cairn and felt the urge to knock it over? Well, officials with Yosemite National Park strongly advise that you do. Rock cairns are man-made piles of rock stacked on ...