In a live chat hosted by Science Careers this week, US National Institutes of Health Advisory Committee to the Director's Biomedical Workforce Working Group co-chair Shirley Tilghman and Federation of American Societies for Experimental Biology President Joseph LaManna addressed reader questions and comments as to whether the US is training too many PhDs.

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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.