This Week in PLOS

In PLOS One, an international team led by investigators in Germany reports on findings from a study using DNA barcoding to test for cryptic speciation in Wolbachia-infected butterflies from the Phengaris genus. Butterflies from that genus are known for a parasitic stage to their life cycles, study authors noted, which may make them prone to infection by Wolbachia and other intracellular microbial parasites.

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23andMe's Anne Wojcicki ponders DNA and what it means to be human in a New York Times essay.

A new estimate places the last universal common ancestor to life on Earth as living 3.9 billion years ago, Inverse reports.

In PNAS this week: retinitis pigmentosa gene therapy, role of microbiome in growth stunting, and more.

Bloomberg reports that researchers and drug companies are modeling anti-obesity treatments after the rare genetic condition essential fructosuria.