If those dates are correct, people were in the interior of North America more than ten thousand years before USR1 was born.

The Monte Verde site in Chile, with well-documented occupation dating to approximately 14,500 to 15,000 years before the present, demonstrates that people had spread to the southern tip of South America well before the Clovis period — which itself predates the Upward Sun River burial by at least a thousand years.

The Anzick burial in Montana, dated to approximately 12,600 years before the present, preserves the remains of a Clovis-period child whose genome has been analyzed and whose genetic profile shows the characteristics of the main Native American founding population.

USR1 at 11,500 years is not the oldest evidence of Americans.