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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The New York Times and ProPublica look into the close relationship between a startup and Memorial Sloan Kettering Cancer Center.

Yahoo News reports millions of dollars are being transferred from NIH, CDC, and other programs to pay for the housing of detained undocumented immigrant children.

In Science this week: in vitro generation of human reproductive cells, and more.

Researchers gave a handful of octopuses MDMA to find that they too act more social on the drug, Gizmodo reports.