Ash spew from Mexico's Popocatepetl volcano, some 55 km from Mexico City, as seen from San Mateo Ozolco, in the Mexican central state of Puebla, on July 4, 2013. (Photo by Pablo Spencer/AFP Photo)

Mushers compete, on January 18 2013 in Megeve, during the departure of a stage of the Grande Odyssee sledding race. (Photo by Jeff Pachoud/AFP Photo)

Sadhus or holy men walk in a procession towards the Sangham or the confluence of the the Yamuna and Ganges rivers to bathe before sunrise during the Kumbh Mela in Allahabad on January 14, 2013. (Photo by Sanjay Kanojia/AFP Photo)

A full moon sets behind the Christ the Redeemer statue on top of Corcovado hill in Rio de Janeiro, Brazil, on May 25, 2013. (Photo by Yasuyoshi Chiba/AFP Photo)

In a picture taken with an underwater camera Mexico's Ivan Garcia and German Sanchez enter the water as they compete in the men's 10-metre synchro platform preliminary diving event in the FINA World Championships at the Piscina Municipal de Montjuic in Barcelona on July 21, 2013. (Photo by Francois Xavier Marit/AFP Photo)

A picture taken on November 22, 2013 of the Moulin Rouge Cabaret at the Pigalle district area in Paris. (Photo by Franck Fife/AFP Photo)

Brazilian big wave surfer Carlos Burle rides a wave in Nazare, central Portugal, on October 28, 2013. (Photo by Francisco Leong/AFP Photo)

A Turkish woman feeds pigeons during a rainy day on November 25, 2013 at Besiktas in Istanbul. (Photo by Bulent Kilic/AFP Photo)

A supermoon rises next to the ancient Greek temple of Poseidon at Cape Sounion, some 65 kilometers south of Athens, on June 23, 2013. (Photo by Aris Messinis/AFP Photo)

Multicolored nets are set under olive trees to collect the olives on November 27, 2013 in Castagniers, southeastern France. (Photo by Valery Hache/AFP Photo)

Flashes of lightning strike above the “Baie des Anges”, on October 4, 2013, in Nice, southeastern France. (Photo by Valery Hache/AFP Photo)

US Garrett McNamara (L) and US Mark Healey (R) compete during a free session of surf tow in, in the southern Pacific ocean island of Tahiti, French Polynesia, on June 1, 2013 in Teahupoo. (Photo by Gregory Boissy/AFP Photo)

Norway's Anders Bardal jumps during the official training session of the FIS Ski Flying World Cup in Vikersund, Norway on January 25, 2013, while a full moon rises over the mountain. (Photo by Daniel Sannum Lauten/AFP Photo)

The Aurora Borealis bright up the sky at twilight on March 17, 2013 between the towns of Are and Ostersund, Sweden. (Photo by Jonathan Nackstrand/AFP Photo)