This Week in PNAS

In the early edition of the Proceedings of the National Academy of Sciences, researchers from Washington University present evidence suggesting gut microbial communities in infant guts vary with gestational age. The team did 16S ribosomal RNA sequencing on more than 900 stool samples to profile microbial community members in stool samples from 58 premature infants of different gestational ages tested 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.

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.