Children pour cold water on themselves under the control of fitness coach Margarita Filimonova (R) at local kindergarten number 317, with the air temperature at about minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit), in Russia's Siberian city of Krasnoyarsk, February 5, 2013. (Photo by Ilya Naymushin/Reuters)

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A girl poses in her costume during a Halloween party at a mall in Quezon city, Metro Manila October 24, 2015. (Photo by Ezra Acayan/Reuters)

Carlos Melendez prepares to feed his pet squirrel “Colita” in downtown San Salvador January 29, 2015. (Photo by Jose Cabezas/Reuters)

A girl jumps over a campfire while celebrating Ivan Kupala Night, a traditional Slavic holiday not far from Kiev on July 6, 2013. During the celebration, originating in pagan times, people plait wreaths, jump over fires, and swim naked. (Photo by Sergei Supinsky/AFP Photo)