Are you familiar with animal-polished rocks? (Specifically, mammoths, but many animals use rocks for rubbing, which is what led the observers to understand the mammoth polish.)
Yes, but I'm not sure I've seen it applied to mammoths! That sounds great.
Cliff- and rock-climbing and nesting birds also leave wear, over time, on their sites.
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Yes, but I'm not sure I've seen it applied to mammoths! That sounds great.
Cliff- and rock-climbing and nesting birds also leave wear, over time, on their sites.
I am not surprised, but I am glad to know it.