Archaeologist Jeffrey Madden identified 565 confirmed Native American dice and 94 probable examples from 45 sites across North America. He excluded artifacts with drilled holes or indistinguishable sides, focusing on carved objects with clear markings. The oldest dice, dating back 12,000 years to Ice Age deposits in Wyoming, Colorado, and New Mexico, predate similar gaming artifacts in the Old World by millennia.

Madden's analysis shows these weren't simple gambling tools but served social functions, facilitating exchange between distant groups through fair, one-on-one games. 12,000 years ago marks the earliest known evidence of intentional random outcome generation. This challenges the long-held view that probabilistic thinking emerged in the Bronze Age, suggesting Native Americans developed these concepts 6,000 years earlier. The findings, published in *American Antiquity*, fundamentally reshape our understanding of probability's global origins.