For its third in a series "honoring individuals who have made extraordinary contributions to the advancement of science," the US Postal Service has issued stamps that commemorate the achievements of the late American scientists Melvin Calvin, Asa Gray, Maria Goeppert Mayer, and Severo Ochoa. The federal mail-carrier says it is honoring the late biochemist and Nobel-laureate Ochoa for his pioneering work in RNA synthesis. "The stamp shows Ochoa in his laboratory in 1959, along with figures representing some of his work on protein synthesis," the USPS says.

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As the UN ponders a ban on gene drives, one malaria researchers says there are less dramatic ways to fight the disease in Africa than unleashing GM mosquitoes on a whole continent.

In Nature this week: an improved reference genome of the Aedes aegypti mosquito, genomes of four species of truffles, and more.

The Associated Press reports that gene-edited food may soon be for sale.

The United Nations is to consider a ban on field testing gene drives at a meeting being held next week, Technology Review reports.