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Nature is not static, it is always in motion. Let's look at two extremes. A small pothole full of water on the trail can be completely filled with a couple of handfuls of gravel. Expand this to...
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Nature is not static, it is always in motion. Let's look at two extremes. A small pothole full of water on the trail can be completely filled with a couple of handfuls of gravel. Expand this to...