Web Resources
The URLs for data presented herein are as follows:Arlequin, http://lgb.unige.ch/arlequin/
Genographic Project, https://www.nationalgeographic.com/genographic/index.html
Network, http://www.fluxus-engineering.com/sharenet.htm
Y Chromosome Haplotype Reference Database (YHRD), http://www.yhrd.org/index.html

Supplemental Data
Document S1. Two Tables

Acknowledgments
We thank all volunteers for participating in this project and Oleg Balanovsky, R. John Mitchell, Fabrício R. Santos, Theodore G. Schurr, and Himla Soodyall for helpful comments. This project was supported in part by a grant from the National Geographic Committee for Research and Exploration; Y.X. and C.T.S. were supported by The Wellcome Trust. We thank Janet Ziegle and Applied Biosystems for providing STR genotyping and QA support. The Genographic Project is supported by funding from the National Geographic Society, IBM, and the Waitt Family Foundation. Two additional tables are available online at http://www.ajhg.org/.