"Bela, a Border collie-Australian shepherd mix, enjoyed a ride through Seattle earlier this month. Last summer, the 8-year-old dog was inducted into the trial of a drug that has been shown to lengthen the lives of lab mice. Some say that Bela, 8, has been acting more like a puppy since then. But she may have been given a placebo. And the drug, which improved the heart health and appeared to delay the onset of some diseases in older mice, may not work the same magic in dogs. Still, the trial represents a new frontier in testing a proposition for improving human health: Rather than seeking treatments for the individual issues that come with age, maybe we can target the biology that underlies aging itself. @fremson photographed Bela while on #nytassignment." By nytimes on Instagram.
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