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People have been stacking rocks since the dawn of time, typically for directional or burial purposes. More recently, park officials began creating them on hiking trails to help ensure hikers don't get lost. But, moving rocks can have numerous unintended consequences for insects, animals and even the land. Plus, more about rocks and geological formations.

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Scientists Say: Hey, Hikers, Stop Stacking Rocks! — Plus More About Rocks
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    Scientists Say: Hey, Hikers, Stop Stacking Rocks!

    Scientists Say: Hey, Hikers, Stop Stacking Rocks!

    If you've been out on a hiking trail lately, you've probably noticed them suddenly popping up everywhere – small, intentionally stacked piles of …

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