CNN  —  Living past 90 comes with a unique kind of loneliness. There’s so much to share from a lifetime of experience, but a dwindling number of confidantes as the average nonagenarian outlives their friends, spouses, and loved ones. In Argentina, some seniors are turning to podcasts to share their stories, instead. Last year, 97-year-old Alberto Chab posted a video online from his home in Buenos Aires with the help of a granddaughter, calling for others around his age to unite and talk about