This Week in PNAS

Editor's Note: Some of the articles described below are not yet available at the PNAS site, but they are scheduled to be posted some time this week.

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Genetic ancestry tested led one woman to learn that her father and another baby boy had been switched at birth, the Washington Post reports.

In Science this week: approach to visualize chromatin structure in nuclei, and more.

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.