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Story summary
- A study in American Antiquity identifies more than 600 two-sided dice, called 'binary lots,' made by Native Americans over 12,000 years ago and predating Bronze Age dice by about 6,000 years.
- Lead researcher Robert J. Madden developed criteria to classify these artifacts, found in Colorado, Wyoming, and New Mexico, and made from wood or bone.
- Critics, including anthropologist Jelmer Eerkens, say more archaeological context is needed to confirm their function.
