By Julia Karow

This article, originally published Oct.7, has been updated with comments from an author of the study.

A primary breast cancer acquired several new mutations in its protein-coding regions as it progressed toward metastasis, according to a new report by Canadian researchers, who argue that studying these mutations might help scientists understand why cancers become treatment resistant.

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The New York Times reports that the US Department of Defense has implemented about half the recommendations made to improve safe handling of dangerous agents.

An Australian-led team has generated a draft genome assembly of the invasive cane toad in hopes it will help in population control, the Sydney Morning Herald reports.

In PLOS this week: approach for teasing out archaic introgression in human genomes, immune transcription features in HCV infection, and more.

Stat News reports that Maryland is promoting itself to the biotech industry with a mobile billboard.