This Week in Nature

In Nature Communications this week, a team from the University of Huddersfield reports on the sequencing of Ashkenazi mitochondrial DNA, finding that maternal Jewish lineages may have originated in Mediterranean Europe and not the Near East or Caucasus as some had thought. The scientists sequenced 74 mitochondrial genomes and analyzed more than 3,500 mitochondrial genomes from across Europe, the Caucasus, and the Near East to reconstruct Ashkenazi genealogical history.

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In a statement, National Institutes of Health Director Francis Collins says sexual harassment is "morally indefensible" and "unacceptable."

Octopuses might owe their intelligence to their liberal alterations to their genes, Cosmos reports.

Stat News and ProPublica report that African Americans are underrepresented in cancer clinical trials.

In Cell this week: genomic analysis of abdominal aortic aneurysm, effect of probiotics on the microbiome, and more.