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Was there anything before DNA and RNA? There might have been TNA, says New Scientist's Michael Marshall. Researchers have recently found that TNA, for threose nucleic acid, can perform one of RNA's key functions, Marshall says — storing genetic information and acting as an enzyme. While TNA is no longer found in nature, it may have been around to help the first forms of life on Earth to develop.

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President Donald Trump might not approve the stricter standards the US Food and Drug Administration is developing for authorizing a SARS-CoV-2 vaccine, according to Politico.

Wired reports that Oxitec has now developed a genetically modified fall armyworm.

A large genetic study finds SARS-CoV-2 viruses with a certain variant are spreading more than others, according to the Washington Post.

In Nature this week: sister-chromatid-sensitive chromosome conformation capture approach, and more.