This Week in Science

In this week's Science, Harvard Medical School's George Church and his colleagues publish a study demonstrating the use of the genome-editing technology CRISPR to inactivate a retrovirus in a pig cell line, marking a step forward to the generation of pig organs for transplantation. Though pig organs are viable as replacements in humans, retroviruses in porcine DNA can be transmitted to humans, potentially causing disease.

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US News & World Report writes that genetic testing of lung tumors can help identify treatments for patients.

A team of researchers plans to sample Loch Ness for environmental DNA, according to Newsweek.

The New York Times writes about the appearance of mosaicism in healthy people.

In PNAS this week: insecticide resistance patterns Anopheles gambiae mosquito, transcriptome patterns in Pseudomonas aeruginosa during infection, and more.