The 24-year-old runner Tirunesh Dibaba, from Ethiopia, has set a new 15-kilometer world record of 46:28 in a road race in the Netherlands, the IAAF reports. Despite not having run a road race since 2005, she broke Kayoko Fukushi's 2006 record of 46:55. Dibaba is the current Olympic champion of the 5,000 and 10,000 meters.
Outside magazine has its own resident runner, associate editor Justin Nyberg, who just ran a 2:35:28 at the New York City Marathon. You can check out his blog, The Running Man, for details.