The Chaco people marked the equinox by carving a small spiral where the rising sun bisects it with a shadow dagger, between the seasons, a powerful symbol of the middle of the sun's journey.
This video is documentation of the Sun Dagger Explorer exhibit at the New Mexico Museum of Natural History and Science.
The exhibit is a fully interactive 3D recreation of a 1000 year old astronomical calendar site on top of Vata Butte in Chaco Canyon, New Mexico.
Chaco Canyon - UNM;
UNM Professor Archaeology since 1986; Director, Chaco Canyon Archaeological Research Lab; wwills@unm.edu Research:
Foraging and early farming societies, economic organization, religion and emergent social complexity, 19th-century Spanish colonial archaeology; US Southwest. Recent Publications:
2022 Communication in the Chaco World: A Consideration of Time and Labor Mobilization. W. H. Wills, Paulina Pryztupa and Katharine Williams. American Antiquity 87(3):457-486. https://www.cambridge.org/core/journals/american-antiquity/article/communication-in-the-chaco-world-a-consideration-of-time-and-labor-mobilization/73B4875754A91940ED629456E030999E
2021 The Pueblo Bonito Mounds: Formation History, Architectural Context and Representational Fields. W. H. Wills, Katharine Williams, Beau Murphy, Paulina Pryztupa, and Wetherbee B. Dorshow. Journal of Anthropological Archaeology 63(2021) 101322 (https://doi.org/10.1016/j.jaa.2021.101322)
2020 Evaluating the Gridded Agricultural Field Model in Chaco Canyon, New Mexico, Using Geophysical Remote Sensing. Jennie O. Sturm and W. H. Wills. American Antiquity 85(2) 367-382. (https://doi.org/10.1017/aaq.2019.98)
2018 The Complex History of Pueblo Bonito and Its Interpretation. Patricia L. Crown and W. H. Wills. Antiquity Vol. 92(364):890-904. Special Issue. https://doi.org/10.15184/aqy.2018.138, article text refers to https://www.chacoarchive.org/cra/ CHA=Chaco Research Archive
2018 Stable Oxygen Isotope Sourcing of Archaeological Fauna from Chaco Canyon, New Mexico. Hamilton, M., B. L. Drake, W. H. Wills, E. Jones, C. Conrad and P. L. Crown. American Antiquity 83 (1):163-175. (https://doi.org/10.1017/aaq.2017.61)
2017 Water Management and the Political Economy of Chaco Canyon During the Bonito Phase (ca. AD 850 to 1200).
Kiva: The Journal of Southwestern Anthropology and History 83:369-413. (https://doi.org/10.1080/00231940.2017.1343109)