This Week in PLoS

A study published today in PLoS Biology looked at increased evolutionary rates in genes, and found, among alignments of 10,238 human genes to their orthologues in chimpanzee and macaque, exons evolving at a fast rate in humans have a tendency to contain clusters of AT-to-GC (weak-to-strong) biased substitutions.

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Technology Review reports that researchers in the US have used CRISPR to modify a number of human embryos.

Plant researchers plan to sequence some 10,000 samples that represent the major plant clades, ScienceInsider reports.

By introducing genes from butterfly peas and Canterbury bells, researchers in Japan have developed a blue chrysanthemum, according to NPR.

In Nature this week: a Danish reference genome, and more.