March 1, 2002 A Romantic Swim From The March-April 2002 Issue Published in the March-April 2002 print issue in the Alumni section. Most popular In 2004, a frenzy spread across Harvard Yard in days. Four billion users later, we are only just catching up. Why Taxi Drivers Don’t Die of Alzheimer’s Explaining taxi and ambulance drivers’ protection against Alzheimer’s disease. All That’s Unseen charts the Harvard graduate’s uneasy journey from Appalachia to Cambridge and back. Explore More From Current Issue Students The 2026-2027 Ledecky and Summer Undergraduate Fellows Technology In 2004, a frenzy spread across Harvard Yard in days. Four billion users later, we are only just catching up. Harvard History Derek Bok donated his car for a good cause.