出典:Wikipedia
出典:『Wikipedia』 (2011/05/09 20:55 UTC 版)
John Harvey Butchart (1907 – May 29, 2002) was a mathematics professor who was well-known for his hiking exploits in and around the Grand Canyon. Over a period of 17 years Butchart hiked the entire length of the canyon, making him the first person known to have done so.