Broken Circle/Spiral Hill
... that the artist Robert Smithson suggested that the boulder in the center of his piece Broken Circle/Spiral Hill was a "warning from the Ice Age"?
... that the artist <a href="./Robert_Smithson" id="mwFw" rel="mw:WikiLink" title="Robert Smithson">Robert Smithson</a> suggested that the boulder in the center of his piece <i id="mwGA"><b id="mwGQ"><a href="./Broken_Circle/Spiral_Hill" id="mwGg" rel="mw:WikiLink" title="Broken Circle/Spiral Hill">Broken Circle/Spiral Hill</a></b></i> <i id="mwGw">(pictured)</i> was a "warning from the Ice Age"?