For Aleksander Doba, pitting himself against the wide-open sea — storms, sunstroke, monotony, hunger and loneliness — was a way to feel alive in old age. Today, listen to the story of a man who paddled toward the existential crisis that is life and crossed the Atlantic alone in a kayak. Three times.Mr. Doba died on Feb. 22 on the summit of Mount Kilimanjaro in Tanzania, Africa. He was 74.This story was written by Elizabeth Weil and recorded by Audm. To hear more audio stories from publications like The New York Times, download Audm for iPhone or Android.