This Week in PLoS

In PLoS Genetics this week, researchers in the UK and New York have identified endogenous viral elements derived from 10 non-retroviral families using systematic in silico screening of animal genomes. "Integration into the nuclear genome of germ line cells can lead to vertical inheritance of retroviral genes as host alleles," the researchers write.

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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.