A few weeks ago, the Gene Expression blog's Razib Khan reviewed a paper in Molecular Biology and Evolution that suggested that Crohn's disease may be the result of a selective sweep driven by adaptation to nutrient deficiencies incurred by European farmers switching to a grain-based diet.

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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.