In a new study in PNAS, researchers at Penn State and the University at Buffalo say their analysis of polar bear DNA has led them to extend to origin of the species back to five million years instead of 600,000 years, reports The New York Times' James Gorman.

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In Science this week: International Wheat Genome Sequencing Consortium publishes the bread wheat cultivar Chinese Spring reference genome, and more.

At his FDA Law Blog, Jeffrey Gibbs discusses FDA's technical assistance for the draft Diagnostic Accuracy and Innovation Act.

The New York Times reports that genetic testing has uncovered unfaithful penguins at a Utah aquarium.

Cancer researcher loses funding under new Wellcome Trust anti-bullying policies, the Guardian reports.