Evolution: Take Two

Eric Gaucher and Betül Arslan at the Georgia Institute of Technology are trying to determine whether a 500 million-year-old bacterial gene will evolve the same way twice, given the chance to start over, says New Scientist's Bob Holmes. The researchers are working with a gene called EF-Tu, which plays a role in protein synthesis in E. coli.

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

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

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

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