Here was a specific individual whose skull had been interpreted as suggesting non-Native American ancestry — and whose genome definitively demonstrated Native American ancestry.

The skull measurements were accurate.

The interpretation was wrong.

This finding has accelerated a broader reassessment of morphology-based ancestry claims across the field.

It has made researchers far more cautious about using skull shape to make definitive statements about population identity, particularly for ancient individuals who lived thousands of years before the modern population groups that serve as reference points were established.

THE SECOND TRANSFORMATION: THE COMPLEXITY OF THE FIRST AMERICANS

The Kennewick case — together with a growing body of ancient DNA evidence from sites across the Americas — helped establish that the peopling of the Americas was far more complex than the simple Clovis First model had suggested.

The evidence now supports a picture in which multiple waves of migration from Asia reached the Americas at different times, by different routes, contributing to the complex genetic and cultural landscape that existed when Europeans arrived.

The first Americans were not a single, homogeneous people; they were diverse populations with distinct origins, whose descendants merged, diverged, and evolved over tens of thousands of years into the hundreds of distinct nations and cultures that existed in 1492.

Kennewick Man, with his unusual skull morphology and his diet rich in ocean protein, is one data point in this complex picture — evidence that the ancient Pacific Northwest was home to people whose physical characteristics differed from later populations in the region, even as their genetic heritage was the same.