Yehuda TurtleIsland.social<p>9,000 Years Old Structure Under Lake Michigan</p><p>Mark Holley, at Northwestern Michigan University, first came across a rock that he said bears a prehistoric carving of a mastodon. On further investigation, he discovered a Stonehenge-like arrangement of ancient stones. </p><p>They stand 40 feet below the water’s surface, and the stones are some 9,000 years old, making this one of the oldest structures ever discovered in North America.</p><p><a href="https://turtleisland.social/tags/Native" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Native</span></a> <a href="https://turtleisland.social/tags/Indigenous" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Indigenous</span></a> <a href="https://turtleisland.social/tags/Mastodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mastodon</span></a><br><a href="https://news.artnet.com/art-world/prehistoric-structure-lake-michigan-stonehenge-2432737" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">news.artnet.com/art-world/preh</span><span class="invisible">istoric-structure-lake-michigan-stonehenge-2432737</span></a></p>