This Week in PLoS

Australian researchers led by Cathy Jensen looked into whether SNPs associated with risk of multiple sclerosis also affect the severity of the disease. To do so, they genotyped seven SNPs in more than a thousand people with MS and correlated that with clinical outcome measures such as age of onset, MS severity score, and the time interval between first demyelinating event and first relapse. The researchers found no association between those clinical outcomes and the SNPs under study.

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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.