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Science 20 July 2007:
Vol. 317. no. 5836, p. 320
DOI: 10.1126/science.1142812
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Technical Comments

Response to Comment on "Redefining the Age of Clovis: Implications for the Peopling of the Americas"

Michael R. Waters1* and Thomas W. Stafford, Jr.2

Haynes et al. misrepresent several aspects of our study. Our revised dates and other archaeological data imply that Clovis does not represent the earliest occupation of the Americas, and we offered both human migration and technology diffusion as hypotheses to explain the expansion of Clovis. We stand by the data and conclusions presented in our original report.

1 Departments of Anthropology and Geography, Center for the Study of the First Americans, Texas A&M University, 4352 TAMU, College Station, TX 77843–4352, USA.
2 Stafford Research Laboratories, 200 Acadia Avenue, Lafayette, CO 80026, USA.

* To whom correspondence should be addressed. E-mail: mwaters{at}tamu.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)