A baby hippopotamus lies next to its mother on the first day it was presented to the public at the Zoo Berlin zoo on November 1, 2011 in Berlin, Germany. The baby hippo was born at the zoo on October 23. (Photo by Sean Gallup/Getty Images)

A newly-born male baby elephant, who so far does not have a name, walks with his mother Temi during his first venture outside at their enclosure at the Tierpark Hellabrun zoo on May 12, 2011 in Munich, Germany. The baby elephant was born at the zoo on May 6. (Photo by Alexander Hassenstein/Getty Images)

A three month-old baby gorilla named Hasani sits in the grass March 11, 2009 at the San Francisco Zoo in San Francisco, California. The newborn gorilla was given the name Hasani. Hasani's father, a twenty seven year-old gorilla named Oscar Jonsey, picked between five color coded cantaloupes representing the five name finalists to come up with the newborn's name that was submitted by Amanda VerPloeg of Oskaloosa, Iowa. (Photo by Justin Sullivan/Getty Images)

In this Friday, January 24, 2014 photo, Afghan refugee girl, Robina Haseeb, 5, poses for a picture, while playing with other children in a slum on the outskirts of Islamabad, Pakistan. (Photo by Muhammed Muheisen/AP Photo)

These images, scanned from old glass negatives which had surfaced in northern France, were believed to have been taken by a local amateur photographer in 1916. They showed British and a few Australian soldiers, in formal or informal poses, during or just before the most murderous battle in the history of the British Empire – Battle of the Somme. Who are these British and British Empire soldiers? The identity of the soldiers is, and may always remain, a mystery... (Property of Bernard Gardin/Dominique Zanardi/Joel Scribe/The Independent Magazine)

A talented artist has created breathtaking intimate portraits by using detailed maps of the world as his canvas. Cardiff-based illustrator, Ed Fairburn, combines the patchwork of roads, terrains and rivers to for his unique sketches. Photo: Ink on a 1977 road map of Germany. (Photo by Ed Fairburn/Rex Features)

Shanghai-based artist Hong Yi, also known as Red, used 750 pair of socks to create a rather unusual sock portrait of famous Chinese film director Zhang Yimou. Yi, which is famous for her Coffee Stain Portrait, spent over three weeks on the project and used black, white and grey socks. (Photo by Ohiseered.com)

Actress Liv Tyler poses for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on January 21, 2012 in Park City, Utah. (Photo by Larry Busacca/Getty Images)