This Week in Science

In a paper appearing in Science Translational Medicine, scientists led by Washington University's Jeffrey Gordon created "humanized gnotobiotic mice" in order to study the effects of diet on the human gut microbial community. Feeding human feces to germ-free mice, they were able to create an animal model of the human gut microbiota, and then they tested how it reacted to certain diets.

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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.