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Researchers have created a kind of "invisible ink for the biotech age" by spreading bacteria — engineered to glow — in encrypted patterns on paper, reports Wired's Brandon Keim. Tufts University chemist David Walt, who co-developed the system, says this "secret agent" application could be used to send cryptic messages.

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Science reports that a new White House Office of Management and Budget memo rescinds previous ones that helped research institutions deal with pandemic-related closures.

Researchers report on a concerning strain of the H1N1 swine flu virus found among pigs in China, Agence France Presse reports.

The Associated Press reports that US officials are considering allowing pooled COVID-19 testing.

In Genome Research this week: Y chromosome gene expression analysis, de novo mutations rise with paternal age in rhesus macaques, and more.