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Origin: A Genetic History of the Americas

by Jennifer Raff

by Jennifer Raff

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Chapter 7<br />

1. This is an ongoing challenge in archaeology. A site can only be<br />

excavated once, and it <strong>the</strong>refore can only be read about by o<strong>the</strong>r<br />

archaeologists (unless some portion <strong>of</strong> <strong>the</strong> site is preserved for <strong>the</strong>m to<br />

study). I believe this has contributed to <strong>the</strong> extremely diverse array <strong>of</strong><br />

opinions on which pre-Clovis sites are “good” and which are considered<br />

“unreliable.” In research for this book I did an informal, completely<br />

unscientific polling <strong>of</strong> six archaeologists whose opinions I regularly rely<br />

on to help me interpret genetics results. They didn’t have a unanimous<br />

opinion about a single site, although most agreed that Page-Ladson was<br />

clearly evidence <strong>of</strong> a pre-Clovis human presence. The sites that most<br />

agreed were valid include Swan Point (Alaska), Paisley Caves (Oregon),<br />

Shaefer and Hebior (Wisconsin), Monte Verde (Chile), and <strong>the</strong><br />

Buttermilk Creek sites (Texas).<br />

2. Jessi J. Halligan, Michael R. Waters, Angelina Perrotti, et al., “Pre-Clovis<br />

Occupation 14,550 Years Ago at <strong>the</strong> Page-Ladson Site, Florida, and <strong>the</strong><br />

Peopling <strong>of</strong> <strong>the</strong> <strong>Americas</strong>,” Science Advances 2, no. 5 (2016): e1600375,<br />

https://doi.org/10.1126/sciadv.1600375.<br />

3. Bastien Llamas, Lars Fehren-Schmitz, Guido Valverde, et al., “Ancient<br />

Mitochondrial DNA Provides High-Resolution Time Scale <strong>of</strong> <strong>the</strong><br />

Peopling <strong>of</strong> <strong>the</strong> <strong>Americas</strong>,” Science Advances 2, no. 4 (2016): e1501385,<br />

https://doi.org/10.1126/sciadv.1501385.<br />

4. References for this section include Peter Forster, Rosalind Harding,<br />

Antonio Torroni, and Hans-Jurgen Bandelt, “<strong>Origin</strong> and Evolution <strong>of</strong><br />

Native American MtDNA Variation: A Reappraisal,” American Journal<br />

<strong>of</strong> Human <strong>Genetic</strong>s 59, no. 4 (1996): 935–945; Michael D. Brown, Seyed<br />

H. Hosseini, Antonio Torroni, et al., “MtDNA Haplogroup X: An<br />

Ancient Link between Europe/Western Asia and North America?”<br />

American Journal <strong>of</strong> Human <strong>Genetic</strong>s 63, no. 6 (1998): 1852–1861,<br />

https://doi.org/10.1086/302155; Antonio Torroni, Theodore G. Schurr,<br />

James V. Neel, et al., “Asian Affinities and Continental Radiation <strong>of</strong> <strong>the</strong><br />

Four Founding Native American MtDNAs,” n.d., 28; Nelson J. R.<br />

Fagundes, Ricardo Kanitz, Roberta Eckert, et al., “Mitochondrial<br />

Population Genomics Supports a Single Pre-Clovis <strong>Origin</strong> with a Coastal<br />

Route for <strong>the</strong> Peopling <strong>of</strong> <strong>the</strong> <strong>Americas</strong>,” American Journal <strong>of</strong> Human

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