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Everyone know that smoking causes an increased risk of cancer, but researchers have also found direct evidence that smoking causes epigenetic changes in genes that block tumors, says The New Scientist's Nic Fleming. Reversing the changes could lead researchers down a new road to treat cancer, he adds.

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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.