You’ll also find a report on “super agers,” people who remain sharp and vital at 80 and beyond; expert advice on whether—and where—to downsize; a feature on the “new normal” for healthy people with chronic health conditions; a brain-fitness test; and the single best exercise for strength and mobility. And we’ll spotlight some prominent people who defy the stereotypes of aging, including businesswoman and best-selling author Martha Stewart, ready to talk about her boundary-breaking appearance—at 81—on the cover of Sports Illustrated’s swimsuit issue. We’ll salute fellow age defiers, like David Hockney, one of the world’s greatest living artists, who is working with vigor into his 80s, and Dusty Baker, manager of the Houston Astros baseball team, who won his first World Series at 73. We’ve included our Martha Stewart interview here in print, together with an excerpt from a piece about how life has changed since AARP started. Back then, only 9 percent of Americans were 65 or older; today the proportion is nearly double that, and we’re changing the world.