IMAGES: Retracing a Long Walk

Science  29 Apr 2005:
Vol. 308, Issue 5722, pp. 609
DOI: 10.1126/science.308.5722.609e

Earlier this month, the National Geographic Society and IBM announced a project to produce a sharper picture of human migrations by analyzing DNA samples from 100,000 people (Science, 15 April, p. 340). The Web site of the Genographic Project is worth a look for the lavishly illustrated backgrounders on genetics and migrations. A timeline depicts what we know about the human expansion from Africa beginning about 60,000 years ago, stopping at landmarks such as the controversial Cactus Hill site in Virginia. Evidence found there suggests that people reached the Americas thousands of years earlier than previously thought. Another section explains how to send in your DNA and find out where your ancestors originated. Genealogical curiosity will cost you $99.95 plus shipping for the test kit.

www5.nationalgeographic.com/genographic

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