A little blue penguin which was found at Papamoa Beach, covered in oil after the Liberian cargo ship, Rena, hit a reef, on October 7, 2011, in Tauranga, New Zealand. Reports of an oil sheen have been spotted on the surface of the water surrounding the ship and two penguins have been found covered in oil. (Photo by SUNLIVE New Zealand/Getty Images)

A Bedouin rifleman hides behind his camel while he carefully takes aim in the Sahara desert. (Photo by Three Lions/Getty Images). Circa 1955

Local residents crowd a swimming pool during a hot weather in Suining, Sichuan province, 27 July 2008. (Photo by Reuters/Stringer)

Hillary Clinton waves to a selfie-taking crowd at a recent campaign event in Orlando, Florida on September 26, 2016. (Photo by Barbara Kinney/Hillary for America)

A train attendant helps a passenger to adjust her seat at the business class carriage on a CRH 380A bullet train Thursday, June 16, 2011. (Photo by Reuters/China Daily)