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POPSGenetics Show How Prehistoric Cultures Migrated & Shared Knowledge The researchers tracked genetic variation on the Y chromosome, the sex chromosome passed from father to son that encodes maleness, using a technique now widely used that was developed in the early 1990s by Underhill and colleagues in the lab of Luigi Cavalli-Sforza, professor emeritus of genetics. The method has given scientists a powerful window into ancient human migrations and prehistoric cultural shifts. The technique has also been adopted by some commercial genealogy services that offer Y-chromosome testing to the public.
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POPSAppalachian Trail: Canary in the Coal Mine "People will read that on 25 or 30 days in a given year, it's considered unhealthy to walk on the Appalachian Trail, and we think that's going to grab people's attention more than if they just read about air quality trends in general," he said. That's also why volunteers will be critical to the project's success. It's one thing for people to read about technical reports on bird migrations, acid rain or air quality, Startzell says. "We think it's another thing when people learn about that firsthand by actually helping to collect that information," he says."
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