The Cool Down on MSN7d
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
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 ...