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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Vivek Murthy is no longer the surgeon general of the US, the Associated Press reports.

People around the globe took to the streets to support science — some with signs.

Parents who learn of their increased genetic risk of disease also contend with telling their children about theirs, the New York Times writes.

In PLOS this week: loci linked to body mass index measurements, long non-coding RNA expression and urothelial carcinoma prognosis, and more.