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Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
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ScienceShot: Native Americans Were a Mix of Asian and European
20 November 2013 2:00 pm
Where did the first Americans come from? Most researchers think Native American roots lie in Asia, although exactly where is not clear; but a few have suggested Europe, a decidedly minority view because today’s Native Americans have clear Asian ancestry. It turns out that both may be right, according to the latest ancient DNA evidence. A team based in Europe and the United States sequenced the entire genome from the skeleton of a boy who lived in Siberia 24,000 years ago (see photo), the oldest complete genome of a modern human to date. Surprisingly, the boy is closely related both to Eurasians and to Native Americans, but not to East Asians. So the researchers think that Native American ancestors with Eurasian roots might have interbred with East Asians sometime before making the journey over the Bering land bridge to the New World. The work, first reported by Science from a meeting in Santa Fe last month, is published today in Nature.