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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Gene drives might run into biological resistance, the Economist reports.

Forensic experts exhumed painter Salvador Dalí's body to collect DNA for a paternity test, CBS News reports.

Yale Environment 360 writes that synthetic and conservation biologists aren't always on the same wavelength, but they are trying to reach an understanding.

In Science this week: full CRISPR locus integration complex structure, and more.