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 president of France's National Research Agency has resigned, according to Nature News.

A senator wants a "right-to-try" provision in the US Food and Drug Administration funding bill, but an ethicist says at Stat News that it would undermine the role of clinical trials.

In PNAS this week: red algae Porphyra umbicalis genome, deep neural network model for sequencing peptides, and more.

The Guardian's Barbara Ellen has tried out some DNA testing services to see whether they provide valuable information.