Or the divergence date needs to be revised.

Or the White Sands people represent a separate founding event that preceded the founding population represented by USR1 and other well-documented early Americans.

This is one of the central unresolved tensions in the study of early Americans.

The genetic models and the archaeological evidence are not yet fully consistent with each other, and the reason they are not consistent is not clear.

It could be that the demographic models need to be revised with better data.