Led by Ph.D. student Robert J. Madden at Colorado State University, this extensive research sheds light on the enduring presence of dice and gambling within Native American cultures from the Late Pleistocene epoch, during the end of the last Ice Age. Madden’s team meticulously studied archaeological sites spanning Wyoming, Colorado, and New Mexico, where these artifacts unequivocally indicate the ancient manufacture and use of gaming implements long before similar devices appeared in the Old World.

The study’s central finding highlights that these earliest dice were not the familiar six-sided cubes but a more primitive form known as “binary lots.” These small bone pieces, ingeniously shaped as flat or slightly rounded ovals or rectangles, were crafted for tactile ease and designed to produce binary outcomes—much like a modern coin toss. Distinct markings and surface modifications on each side of these dice distinguished the “counting” face, ensuring reliable differentiation when tossed in groups to generate game scores.

Through this binary outcome mechanism, ancient Native Americans ingeniously employed randomization principles that hint at nascent forms of probabilistic thought. Madden explains that these artifacts were “simple, elegant tools” intentionally created for generating random results, demonstrating purposeful design rather than incidental byproducts of material craftsmanship.

To objectively identify dice within the vast archaeological record, Madden devised a novel attribute-based morphological test derived from an exhaustive comparative analysis of 293 sets of historic Native American dice documented in ethnographer Stewart Culin’s early 20th-century monograph Games of the North American Indians. This systematic approach involved a checklist of quantifiable physical features, setting a rigorous standard for dice identification independent of subjective interpretation.

Applying this framework to existing archaeological collections led to the identification of over 600 diagnostic and probable dice specimens spanning a temporal range from the Late Pleistocene through the post-European contact period. Many of these artifacts had been excavated and accessioned into museum repositories for decades but lacked definitive classification due to the absence of a formalized identification standard.

The research team conducted direct examinations of seminal dice artifacts housed in three key institutions—the Smithsonian Institution’s Division of Anthropology, the University of Wyoming Archaeological Repository, and the Denver Museum of Nature and Science—culminating in a comprehensive reevaluation of these critical cultural objects and their significance.

From a broader historical and intellectual standpoint, this discovery fundamentally challenges the prevailing academic consensus which held that dice games—reflecting humanity’s earliest interaction with randomness and precursor intellectual engagement with probability theory—originated exclusively in complex Old World societies roughly 5,500 years ago. Madden’s findings delineate a far older, geographically distinct lineage of probabilistic gaming.

Although not suggesting that Ice Age hunter-gatherers conceptualized formal probability theory, the research posits that these ancient groups engaged intuitively with random processes, employing repeatable, rule-governed games that leveraged consistent probabilistic patterns such as the law of large numbers. This sheds new light on the global evolution of probability and mathematical thinking, emphasizing indigenous contributions.

Furthermore, the archaeological record reveals the remarkable spatial and temporal persistence of dice use across at least 57 sites within a dozen states, encompassing diverse socio-cultural milieus and subsistence strategies. This continuity attests to the significant social and cultural functions of chance-based games among Native American populations over thousands of years.

Madden elucidates that such games provided structured, neutral arenas that facilitated intergroup interaction, the exchange of goods and knowledge, alliance formation, and strategies for managing uncertainty in complex social landscapes. In this sense, dice and gambling acted as sophisticated social technologies enabling cohesion and negotiation within and between indigenous communities.

The cultural importance and resilience of this gaming heritage persist into living Native American traditions today, underscoring an unbroken continuum of engagement with chance, competition, and communal connection spanning millennia. This enduring legacy situates Native American contributions as foundational to the human story of gaming and stochastic reasoning.

The study, titled “Probability in the Pleistocene: Origins and Antiquity of Native American Dice, Games of Chance, and Gambling,” promises to enrich anthropological, archaeological, and mathematical discourses alike, inviting a reevaluation of indigenous intellectual histories through a rigorous, evidentiary lens grounded in both material culture and probabilistic analysis.

As the research appears in the April 2, 2026 issue of American Antiquity, it heralds a significant advance in understanding how early humans across continents grappled with randomness, gaming, and structured social interaction—opening new avenues for interdisciplinary inquiry and expanding the scope of archaeological science.

Subject of Research: Origins and antiquity of Native American dice, games of chance, and gambling during the Late Pleistocene and Holocene periods.

Article Title: Probability in the Pleistocene: Origins and Antiquity of Native American Dice, Games of Chance, and Gambling

News Publication Date: March 23, 2026

Web References:
DOI: 10.1017/aaq.2025.10158

Image Credits: Photo courtesy of Robert Madden, featuring Late Pleistocene to Late Holocene prehistoric Native American dice from sites in Nebraska, Wyoming, Colorado, and New Mexico, courtesy of Smithsonian Institution and University of Wyoming collections.

Keywords: Native American archaeology, dice, games of chance, gambling, Late Pleistocene, probability theory, random processes, cultural anthropology, material culture, prehistoric gaming, social anthropology, mathematical history

A recent scientific investigation, published in Frontiers in Conservation Science, sheds new light on why certain bison kill sites fell into disuse despite the continued presence of bison herds nearby. Centered on the Bergstrom site in central Montana, an archaeological locale actively utilized for approximately 700 years, the study explores why hunters ceased visiting the site around 1,100 years ago. Dr. John Wendt, the study’s lead author and paleoecologist at New Mexico State University, explains that environmental stressors, particularly severe, recurring droughts, constrained water availability critical for processing large game. These climatic challenges intersected with shifting socio-economic dynamics, prompting hunters to abandon a site that had once been highly productive.

The multidisciplinary research team employed an integrative approach, combining detailed archaeological excavation with paleoenvironmental reconstructions. In 2019, nine 1×1 meter excavation pits were systematically opened at Bergstrom, with careful documentation and photographic records taken of all materials recovered. Charcoal fragments recovered from sediment layers underwent radiocarbon dating to establish a precise chronology. Simultaneously, sediment cores were extracted adjacent to the excavation area and subjected to palynological and charcoal analyses, further elucidating past vegetation patterns and fire regimes. Supplementing this, data on large herbivore populations and regional climatic reconstructions were synthesized to discern possible ecological or anthropogenic causes behind the site’s abandonment.

Intriguingly, the analyses indicated that ecological factors, such as bison abundance and vegetation composition, remained largely stable across the period leading to site abandonment. The sporadic fire activity and steady presence of herbivores suggested that ecological degradation was not the primary driver for deserting Bergstrom. Instead, the research underscores that hunter activity did not directly mirror prey availability; rather, external factors influenced settlement and hunting strategies.

A critical discovery was the role of prolonged drought episodes, which profoundly affected the hydrological landscape. Limited water resources, especially at the small creek near Bergstrom crucial for processing carcasses and sustaining winter activities, rendered the site vulnerable amid climate stressors stretching over several decades. This scarcity substantially reduced the site’s attractiveness for repeated occupation and large-scale operations, forcing hunter groups to reconsider their spatial strategies.

Concurrently, the study notes a significant sociological shift in hunting group dynamics. Earlier, small, mobile bands hunted opportunistically, adapting swiftly to local conditions. Over time, these bands coalesced into larger, more coordinated groups undertaking complex, infrastructure-supported hunts. Such larger operations favored extensive bison kills, generating surplus meat that could be stored or traded, but also necessitated stable, resource-rich locations. Reliance on reliable water sources, abundant forage for herd maintenance, and fuel for processing fires became paramount.

The geomorphological attributes of ideal hunting sites further restricted options. Large-scale bison drives required specific topographical features such as cliffs and natural enclosures conducive to directing herds. Sites fulfilling these criteria were rare but could support intensive, repeated use spanning centuries. Hence, hunters’ strategic consolidation around fewer, more suitable sites was a form of cultural adaptation aimed at maximizing returns under changing environmental and social contexts.

This cultural flexibility, emphasizing the maintenance of institutional knowledge and the capacity to restructure hunting practices, was instrumental in the long-term persistence of bison hunting traditions despite climatic variability. The Bergstrom site exemplifies such sophisticated adaptation; although eventually abandoned, it reflects broader patterns of human resilience and dynamic response to environmental constraints. Enduring drought conditions necessitated relocation and innovation rather than simple cessation of bison exploitation.

Importantly, the study cautions against broad generalizations. While the Bergstrom site abandonment was linked to drought and socio-economic restructuring, other bison kill sites in the region could have different histories influenced by alternate forces. Moreover, the research acknowledges limitations in resolving the duration and frequency of site use over the 700-year period, as well as the possibility of subtle, intermittent utilization leaving minimal archeological traces.

This nuanced understanding of late Holocene bison hunting sheds light on prehistoric human-environment interactions and emphasizes that ecosystem stability does not preclude dramatic shifts in cultural practices. The research contributes crucial knowledge relevant for contemporary bison management, suggesting that flexible, adaptive strategies may enhance resilience amid ongoing and future climate variability.

Dr. Wendt concludes that the story of Bergstrom echoes a larger narrative: “While humans have navigated climate challenges for millennia, the last 2,000 years demonstrate how communities reorganized in response to recurring droughts, underscoring the continuous interplay between environment, culture, and subsistence.”

The findings not only enrich archaeological and ecological discourse but also provide valuable insights for modern conservation efforts, highlighting that sustainable management of wildlife resources benefits from preserving cultural adaptability and system flexibility in the face of environmental uncertainty.

Subject of Research: Not applicable
Article Title: American Bison Kill Site Use and Abandonment Amid Drought and Cultural Shifts in Late Holocene Montana
News Publication Date: 10-Feb-2026
Web References: DOI: 10.3389/fcosc.2025.1688950
Image Credits: John Wendt
Keywords: American Bison, Great Plains, archaeological excavation, paleoecology, drought, Late Holocene, site abandonment, hunting strategies, cultural adaptation, climate variability, paleoenvironmental reconstruction, Montana