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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Two new Reproducibility Project: Cancer Biology studies have largely reproduced the original findings, ScienceInsider reports.

DNA fingerprinting could catch some sample mix-ups at pathology labs, the New York Times says.

In Cell this week: DNA methylation and T cell exhaustion, longevity in C. elegans, and more.

A Maryland police department has turned to DNA phenotyping to develop a suspect sketch, WJLA reports.