Watchlist Countdown, Day 27: “Strava” by Steven Hayward

      Strava is a smart phone application invented by Michael Horvath and Mark Gainey, a pair of friends who were crewmates in college and missed competing with each other after they had moved to different cities. Early in 2009, they realized GPS data had become specific enough to identify climbs based on elevation and distance and that it should be possible to record people’s times and compare them. This is what Strava does. It tracks your movement. It tells you how fast and h...