A new study may finally put to bed the age-old question: Are liberals smarter than conservatives? Well, it would appear so. The study, which will appear in the March 2010 issue Social Psychology Quarterly, advances a new theory suggests that more intelligent people are more likely than less intelligent people to adopt preferences and values that are considered "evolutionarily novel." The researchers say that our intelligent ancestors were able to find new and novel ways to work out problems for which there were no innate solutions.

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Senator Elizabeth Warren (D-Mass.) has released the results of a genetic ancestry analysis, the Boston Globe reports.

Retraction Watch's Ivan Oransky and Adam Marcus report that Harvard Medical School and Brigham and Women's Hospital have recommended that more than 30 papers from a former researcher be retracted.

Thomas Steitz, who won the 2009 chemistry Nobel Prize for his ribosome work, has died, the Washington Post reports.

In PLOS this week: mechanisms for genes implicated in coronary artery disease, rumen microbes and host genetics influence cow methane production, and more.