Petroglyph covered beach in Alaska

This was new to me, never heard of these before. The spiral drawing seems to be a theme all over the world, makes you wonder if there is a universal meaning. I was thinking these should be preserved but probably too hard if they are part of the rock sea wall.
 
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The spiral drawing seems to be a theme all over the world
I thought the exact same thing when reading the article. It is prevalent all over when supposedly nobody had contact with anyone on the other side of the flat world lol
 
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I thought the exact same thing when reading the article. It is prevalent all over when supposedly nobody had contact with anyone on the other side of the flat world lol
It makes you wonder if these spots were marked for some special reason.
 
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