This Week in Science

In Science this week, a team of Swedish and US scientists present a genomic analysis of species of finches from the Galapagos Islands, identifying the genetic locus associated with the differences in sizes observed by Charles Darwin, contributing to his principle of character divergence — a process of morphological divergence that reduces competition for limited resources. The researchers sequenced the genomes of six species of Darwin's finches that differ in size and related traits.

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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.