Although it hasn't produced the hype of the arsenic bacteria story, researchers have made what In the Pipeline's Derek Lowe calls "a real advance in the field of engineered 'unnatural life.'" The researchers, who recently published their work in Angewandte Chemie International, forced bacteria to use thymine-5-chlorouracil — which has a chlorine atom where thymine's

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Chinese state news agency Xinhua reports that a preliminary investigation has found He Jiankui performed his gene-editing work illegally.

John Mendelsohn, a former president of the University of Texas MD Anderson Cancer Center, has died, the New York Times reports.

Identical twins receive different estimates of ancestry from the same direct-to-consumer genetic testing firms, CBC reports.

In PNAS this week: chromosomal features of maize, adaptations in the vinous-throated parrotbill, and more.