A Go-Pro attached to a balloon travels to 88,000 ft. and records some great video, before it returns to earth when the balloon bursts. The camera wasn't found for 2 years when it was recovered by a hiker. The ascent started near the Grand Canyon. Wonder why they didn't have some sort of locating device on it?
http://www.nytimes.com/video/scienc...=Full®ion=Marginalia&src=me&pgtype=article
http://www.nytimes.com/video/scienc...=Full®ion=Marginalia&src=me&pgtype=article