This Week in Science

In Science this week, a team of Italian researchers reports on the results of a study of mitochondrial DNA obtained from the teeth of ancient humans, giving new insights into the downfall of Neanderthals in Europe. The Protoaurignacian culture appeared in southwestern and south-central Europe around 42,000 years ago, but it has been unclear whether it is the result of anatomically modern humans or the Neanderthals they soon replaced.

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In a survey, about half of Canadian government scientists say they still feel as though they cannot speak freely, ScienceInsider reports.

The Atlantic reports that biohacker Josiah Zayner regrets injecting himself with the CRISPR gene-editing tool on stage.

Clinicians in China are moving ahead with a number of CRISPR trials, NPR reports, as the US embarks on its first.

In Nature this week: genomic approaches applied to study Neolithic and Bronze Age Europeans, and more.