In this photo taken Thursday January 17, 2013, sled dogs Poncho, left, and his blind brother Gonzo are hooked up for a run at the Muddy Paw Sled Dog Kennel, in Jefferson, N.H. Poncho has taken to helping his blind brother on regular runs. (Photo by Jim Cole/AP Photo)

A monkey licks ice during the annual “monkey buffet” in Lopburi province, some 150 kms north of Bangkok on November 24, 2013. More than 2,000 kilos of fruits and vegetables were offered to the monkeys during the annual festival to help promote tourism in the area. (Photo by Pornchai Kittiwongsakul/AFP Photo)

A new type of tandem at Alexandra Palace, London. (Photo by Fox Photos/Getty Images). June 1936

Two women lighting cigarettes on a tennis court in Essex, England circa 1930's. (Photo by Keystone View/FPG/Getty Images)

Princess Elizabeth with her husband Prince Philip Duke of Edinburgh and their children Prince Charles and Princess Anne. (Photo by Keystone/Getty Images). August 1951

Two brown bear cubs born at Whipsnade Zoo. (Photo by Evening Standard/Getty Images). 1970

Men at work at the Cardiff Institute, making huge baskets, unique in size and construction, for loading oil cake in South Africa. (Photo by Maeers/Getty Images). 1938

Father Christmas reading with three young children. (Photo by Spencer Arnold/Getty Images). Circa 1915