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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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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.