This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, an international team describes unexpected findings from a mitochondrial DNA analysis of ancient Botocudo Indian skull samples from Brazil. When they assessed mtDNA sequences from 14 Botocudo samples — believed to stretch back to the 19th century —investigators determined that a dozen of the individuals belonged to a mitochondrial haplogroup associated with Amerindian populations.

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Vivek Murthy is no longer the surgeon general of the US, the Associated Press reports.

People around the globe took to the streets to support science — some with signs.

Parents who learn of their increased genetic risk of disease also contend with telling their children about theirs, the New York Times writes.

In PLOS this week: loci linked to body mass index measurements, long non-coding RNA expression and urothelial carcinoma prognosis, and more.