Identical twins may not have identical DNA, says this New York Times article. According to new research published in the March issue of The American Journal of Human Genetics, scientists who studied genes of 10 pairs of identical twins found that not only do epigenetic changes abound, but copy number variations at the DNA level are also prevalent.

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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.