What form it took — whether simple bundled-reed craft, dugout logs, skin boats, or something else entirely — is beyond the reach of the evidence.

The ocean crossing is required by logic; the vessel that made it is invisible to archaeology.

The Second Opening — What An Island Crossing Means For The History Of A Continent

By approximately the late 1990s and early 2000s, when the revised Arlington Springs dates had been published and the geological work had confirmed the terminal Pleistocene context, the implications for the broader question of how the Americas were first populated had become a subject of intense discussion.

The traditional model of the peopling of the Americas — Clovis First — had been the dominant framework for most of the twentieth century.