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No one ever said New York's Hudson River was clean. But instead of killing off the Atlantic tomcod that live in the river, the contaminants have forced the fish to evolve to adapt to their environment. A team of researchers recently published a study in Science that shows the Hudson River fish have a gene variant in AHR2, a six-base deletion that is absent in other tomcod populations. This suggests that AHR2 is the tomcod's "basis of resistance" to PCBs.

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Bloomberg reports that the DNA-for-cash deal reported in Kentucky might be a more widespread scam.

St. Jude Children's Research Hospital scientists have treated infants with X-linked severe combined immunodeficiency using gene therapy in an early phase study.

St. Louis Public Radio reports that some African Americans are turning to DNA ancestry testing to help guide genealogical searches.

In Nature this week: a genomic analysis of the snailfish Pseudoliparis swirei, ancient DNA analysis gives insight into the introduction of farming to England, and more.