On day seven, Ray Zahab had to stop to deal with a very large blister. If you're squeamish about feet and peeling skin, don't watch the above video. If you're curious about what kind of blisters form on a man running 30-40 miles a day across some of the driest terrain on earth, click play.
--Bob Cox and Ray Zahab will be sending daily updates as Ray runs roughly 40 miles a day for 16 days across one of the driest places on earth, the Atacama Desert. For more on their journey, check out atacamaextreme.com.