This Week in PLOS

In PLOS Genetics, the University of California, Santa Cruz's Beth Shapiro and colleagues from the US, Russia, and Canada present evidence for a relatively straightforward model for polar bear evolution. Using genomic sequence data on seven polar bears, one black bear, one mainland brown bear, and one brown bear from Alaska's Admiralty, Baranof, and Chichagof, or ABC, islands, the team uncovered an over-representation of polar bear sequences on the ABC brown bear X chromosome.

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A new analysis examines the gender gap among paper authors in the sciences and says it may take decades or more to close.

Researchers have uncovered signals of selection that may enable the Bajau people to free five hundreds of feet deep, Reuters reports.

In Science this week: paternally inherited cis-regulatory structural variants in autism, and more.

A new report outlines issues facing the implementation of personalized medicine in the UK, the Independent reports.