Japanese Macaque monkeys relax in the hot spring at the Jigokudani (Hell's Valley) Monkey Park on January 30, 2010 in Yamanouchi, Japan. This Macaque troop regularly visits the Jigokudani-Onsen springs to escape the cold. This behavior originates from a female Macaque who ventured into the hot springs to retrieve soybeans in 1963.
Koichi Kamoshida/Getty Images
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