To Fight Disease, Researchers Aim to Slow Down Aging Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Whether it's cancer or heart disease, a stroke or diabetes, the greatest risk factor for the developed world's most deadly diseases is age. ( CONEYL JAY / Getty ) Produced by Thalia Beaty Produced by PRI and WNYC