An investigation at the University of Minnesota concludes that a 2001 paper on stem cells from Catherine Verfaillie's lab, and published in Blood, contained falsified images, reports the Associated Press. The investigation cleared Verfaillie of wrongdoing but says she provided "inadequate training and oversight" to her graduate student, Morayma Reyes.

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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.