Across the northern Great Plains of North America, stone arrangements known as medicine wheels have endured for thousands of years — low cairns connected b
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Across the northern Great Plains of North America, stone arrangements known as medicine wheels have endured for thousands of years — low cairns connected by spoke-like lines of stone, sometimes spanning 25 meters in diameter. The most famous, the Bighorn Medicine Wheel in Wyoming, sits at nearly 3,000 meters altitude and features 28 spokes radiating from a central cairn to an outer ring, with six smaller cairns placed at specific points along the perimeter. Astronomer Jack Eddy demonstrated in 1974 that these outer cairns align with the summer solstice sunrise and the heliacal risings of the stars Aldebaran, Rigel, and Sirius — key markers of the seasonal calendar. Similar stone constructions dot the landscape from Wyoming to Alberta, some dating back over 4,500 years. These structures reveal that Indigenous peoples of the Great Plains developed sophisticated astronomical observation traditions long before European contact — knowledge encoded not in writing but in stone arrangements that have quietly tracked the stars for millennia.
This interactive archaeological story lets you choose your path through competing perspectives on ancient mysteries. Navigate branching narratives that present mainstream archaeological interpretations alongside alternative hypotheses, examining the evidence from multiple angles. Each choice leads to deeper exploration of the archaeological record, geological data, and scholarly debate surrounding this ancient enigma.