According to National Science Foundation statistics generated by the agency's annual Survey of Earned Doctorates, US institutions awarded 49,562 research doctorates in 2009, which represents the highest number ever reported by the study and a 1.6 percent increase over the 2008 total.

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Labs in the US and South Korea are hoping to bring the woolly mammoth back from beyond extinction, Newsweek writes.

Geneticist Adam Rutherford speaks with National Geographic about paleogenetics, race, and more.

Researchers link genetic links between education and smoking and longevity.

In PNAS this week: influence of gene environment interactions on polygenic traits, epigenetic features affecting fruit fly foraging, and more.