Amy Bishop — the University of Alabama biology professor accused of opening fire on her colleagues and killing three of them in 2010 — has entered a plea of not guilty by reason of mental disease or defect, reports the Nature News blog's Meredith Wadman. The trial is set to begin on March 19, 2012, and the prosecution is seeking the death penalty, she adds.

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A fire at a Manchester hospital may have destroyed lab equipment and data, the Guardian reports.

Researchers generate a genetic database from skeletal remains from the 1845 Franklin Expedition to the Arctic, Live Science reports.

Researchers in China have begun another trial using CRISPR/Cas9 approaches in cancer patients, according to the Wall Street Journal.

In Science this week: human DNA found in sediments from archeological sites lacking bones, and more.