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Epigenetics brings both good news and bad. Bad news first: there's evidence that lifestyle choices like smoking and eating too much can change the epigenetic marks atop your DNA in ways that cause the genes for obesity to express themselves too strongly and the genes for longevity to express...
The funny thing is, scientists have known about epigenetic marks since at least the 1970s. But until the late '90s, epigenetic phenomena were regarded as a sideshow to the main event, DNA. To be sure, epigenetic marks were always understood to be important: after all, a cell in your brain...
When Pembrey, Bygren and Golding looked at the sons of those 166 early smokers, it turned out that the boys had significantly higher body mass indexes than other boys by age 9. That means the sons of men who smoke in prepuberty will be at higher risk for obesity and...
Moving Images The photos in your Year in Pictures issue made me cry [Dec. 21]. I was particularly moved by James Nachtwey's photo of the Afghan amputee and his comments on "veteran" amputees doing physical therapy with those who recently lost a limb. The work of these physical therapists...
It's Our War Too The title of your Dec. 14 issue, "It's His War Now," demonstrates a problem with modern media. While our young men and women are suffering physical and emotional calamities overseas, the talking heads and magazine editors remain obsessed with declaring winners and handicapping horse...