Everything You Always Wanted to Know About Going the Distance

To accompany its extraordinary one-hour documentary, "Marathon Challenge," the crew at Nova has put together a web page that is almost as informative as the video.  "Marathon Challenge," which attempts to demonstrate that anyone ( OK, almost anyone) can run 26.2 miles, fast, airs at 8 EST tonight. The web page, we hope, will remain in place for a very long time, right here.