A tattoo artist applying ink on a girl's thigh at the 2016 Italian Tattoo Artists at the Palavela on September 17, 2016 in Turin, Italy. (Photo by Stefano Guidi/ZUMA Press/Splash News)

Japanese macaques are relaxed in an outdoor hot spring bath at Hakodate Tropical Botanical Garden on December 1, 2016 in Hakodate, Hokkaido, Japan. The garden offers the hot spring treatment to macaques until May next year. (Photo by The Asahi Shimbun via Getty Images)

A girl wearing a mask takes part in a procession celebrating the religious holiday of Mawlid al-Nabi, the birthday of Prophet Mohammad, in Benghazi, Libya December 10, 2016. (Photo by Esam Omran Al-Fetori/Reuters)

An abandoned motorboat is seen on the bank of a bay near Krabozavodskoye settlement on the Island of Shikotan, one of four islands known as the Southern Kuriles in Russia and the Northern Territories in Japan, December 19, 2016. (Photo by Yuri Maltsev/Reuters)

A girl looks around displays at the world premiere of “Meet Vincent van Gogh” exhibition in Beijing, China, June 15, 2016. (Photo by Kim Kyung-Hoon/Reuters)

A girl pours water over a dog to cool it down, in the rebel held besieged town of Douma, eastern Damascus suburb of Ghouta, Syria, June 23, 2016. (Photo by Bassam Khabieh/Reuters)

A girl reacts as she receives polio vaccine drops during a house-to-house vaccination campaign in Yemen's capital Sanaa, November 10, 2015. (Photo by Khaled Abdullah/Reuters)

An internally displaced girl stands on an abandoned railway tracks beside a makeshift refugee camp in Sinjar town, in Idlib province, Syria November 20, 2015. (Photo by Ammar Abdullah/Reuters)