This Week in PLOS

Adam Eyre-Walker from the University of Sussex and Nina Stoletzki examine post-publication peer review in PLOS Biology. Drawing on two datasets — one from the Wellcome Trust and the other from F1000 — of researchers' ratings of published work, they find that researchers appear to be swayed in their assessment by the impact factor of the journal in which the study appears.

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Researchers find that historical factors influence which genes are the most highly studied, the Atlantic reports.

The US National Science Foundation's new sexual harassment policy is to go into effect next month, according to Nature News.

Researchers report using genotyping to tie together illegal ivory shipments and trace them back to a handful of cartels, the New York Times reports.

In Nature this week: genomic ancestry analysis of Sardinians, current noncoding mutations in colorectal cancer, and more.