This Week in PLOS

A PLOS One study by Swiss researchers suggests individuals may have distinct and distinguishable metabolite profiles in their breath. The research team used real-time mass spectrometry to assess exhaled compounds in breath samples from six men and five women. Analyses of the samples — taken at multiple times per day for each individual over nine days — revealed consistent core metabolite "breathprints" that were specific to each individual and remained stable over time.

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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.

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

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

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