January 7, 2014
From Icy Days and Nights, one of 34 photos. Here, tourists visit the ice buildings on display at the Grand Ice and Snow World during the 30th Harbin International Ice & Snow Sculpture Festival on January 5, 2014 in Harbin, China. This year’s Ice and Snow World features the theme “Global Ice and Snow Dream, World Cartoon Tour”. Photographed with a variable plane lens. (Lintao Zhang/Getty Images)

From Icy Days and Nights, one of 34 photos. Here, tourists visit the ice buildings on display at the Grand Ice and Snow World during the 30th Harbin International Ice & Snow Sculpture Festival on January 5, 2014 in Harbin, China. This year’s Ice and Snow World features the theme “Global Ice and Snow Dream, World Cartoon Tour”. Photographed with a variable plane lens. (Lintao Zhang/Getty Images)

February 27, 2013
From A Siberian Winter, one of 31 photos. Here, a man walks through a tunnel formed by ice crystals from surrounding permafrost, outside the village of Tomtor in the Oymyakon valley in northeast Russia, on January 28, 2013. The coldest temperatures in the northern hemisphere since the beginning of the 20th century were recorded in the Oymyakon valley, known as the northern “Pole of Cold”, reaching a temperature of -67.8 degrees Celsius (-90 degrees Fahrenheit) in 1933. (Reuters/Maxim Shemetov)

From A Siberian Winter, one of 31 photos. Here, a man walks through a tunnel formed by ice crystals from surrounding permafrost, outside the village of Tomtor in the Oymyakon valley in northeast Russia, on January 28, 2013. The coldest temperatures in the northern hemisphere since the beginning of the 20th century were recorded in the Oymyakon valley, known as the northern “Pole of Cold”, reaching a temperature of -67.8 degrees Celsius (-90 degrees Fahrenheit) in 1933. (Reuters/Maxim Shemetov)

January 9, 2013
From Wintry Weather, one of 34 photos. Frost covers the tips of a woman’s hair as she shields her face while facing the abnormally freezing outdoors in the Siberian city of Novosibirsk, about 2,800 km east of Moscow, on December 14, 2012. The temperatures in Novosibirsk had dropped to -35C (-31F). (Valery Titievsky/AFP/Getty Images)

From Wintry Weather, one of 34 photos. Frost covers the tips of a woman’s hair as she shields her face while facing the abnormally freezing outdoors in the Siberian city of Novosibirsk, about 2,800 km east of Moscow, on December 14, 2012. The temperatures in Novosibirsk had dropped to -35C (-31F). (Valery Titievsky/AFP/Getty Images)