A man wearing a goat mask runs into the English Bay during the annual New Year's Day Polar Bear Swim in Vancouver, British Columbia, Jan. 1, 2013. 

A man eats a part of an Uromastyx lizard, also known as a dabb lizard, in a desert near Tabuk, April 19, 2013. 

An Emerald Dove is placed in a mug to be weighed during the annual bird health check at Chester Zoo in Chester, northern England, March 6, 2013. 

Fisherman Ompong Vargas, 39, who wears a facial mask made of fabric to protect his skin from getting darker, holds a fish in his mouth as he searches a net at Laguna de Bay in Taguig City, Manila, May 24, 2013. 

Wolf researcher Werner Freund bites into a deer cadaver next to a Mongolian wolf in an enclosure at Wolfspark Werner Freund, in Merzig in the German province of Saarland, Jan. 24, 2013. 

A slightly off-course mother duck leads her ducklings past the White House briefing room doors in Washington, May 27, 2013. 

A radio-controlled Superman plane, flown by designer Otto Dieffenbach, passes the moon during a test flight in San Diego, Calif., June 27, 2013. 

A woman takes pictures of the art installation "Alice" by Spanish artist Cristina Lucas in the Andalusian Centre of Contemporary Art in the Andalusian capital of Seville, southern Spain, April 10, 2013. 

A girl walks past a poster featuring a cat during the Athens 21st International Cat Show, Jan. 27, 2013.

A woman test rides an Animal Cycle at Toy Fair 2013 in New York, Feb. 11, 2013. 

A frog is captured during a lift off of NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) from NASA's Wallops Flight Facility in Virginia, Sept. 6, 2013. 

A hot air balloon shaped like Darth Vader's head lands after a sunrise flight in Canberra, March 9, 2013. 

A worker pours water on snakes before cutting their skins at a snake slaughterhouse at Kapetakan village near Cirebon, Indonesia's West Java province, Feb. 8, 2013. 

Women dressed as sirens perform from inside a tank at the Sao Paulo Aquarium, Sept. 17, 2013. 

A worker deflates a Chicago Bears inflatable mascot prior to the NFL football game between the Chicago Bears and the Cincinnati Bengals in Chicago, Sept. 8, 2013. 

Two dancers pass each other as they compete in a heat during the All Scotland Championships in Irish Dancing at the Royal Concert Hall in Glasgow, Feb. 23, 2013. 

Maria Jose Cristerna, a Mexican tattoo artist and former lawyer known as "Mujer Vampiro" (or Vampire Woman), poses for a photograph during the "Expo Tatuaje" international in Monterrey, March 2, 2013. 

Belgian artist Beatrice Van Landeghem adjusts the hair of Sofia, one of her life-like "Reborn Baby" dolls, at her workshop called "La nurserie des Tis Lous De Bea" in La Louviere, southern Belgium, Aug. 8, 2013. 

A man dressed as Batman and a burglary suspect stand in a police station in Bradford, northern England, Feb. 25, 2013, in this still photograph taken from video and provided by West Yorkshire Police on March 4, 2013. A mystery man dressed as Batman demonstrated the same crime-fighting skills as the caped crusader when he handed over a suspect wanted for burglary in Britain. 

Small plastic bags holding fish, turtles and salamanders are displayed for sale at a shopping district in Beijing, March 7, 2013. Each bag, filled with oxygen and nutritional liquid, can keep the animal it holds alive for two months and is sold for 10 RMB ($1.6), the vendor said. The Chinese believe such charms can bring good luck. 

People sunbathe by the wall of the Peter and Paul Fortress in St. Petersburg, March 10, 2013. 

Bagpipers from Romania's Vrancea region perform as they take part in a St. Patrick's Day parade in Bucharest, March 17, 2013. 

Genetically engineered Pterophyllum Scalara fish glow in a tank under a blacklight while being displayed at the 2013 Bio Expo in Taipei, July 18, 2013. 

A Hindu devotee looks on in a cloud of colored powder inside a temple during "Lathmar Holi" at the village of Barsana in the northern Indian state of Uttar Pradesh, March 21, 2013. 

Robert Burck gets takes a knee while saying a prayer in the bathroom of a car garage before taking to the streets of Times Square, New York City, June 6, 2013. Burck, better known as the original "Naked Cowboy," started performing in Time Square in 1998. 

Cory Solomon of Prairie View, Texas flips a calf in the tie-down roping event during the finals of the 101st Calgary Stampede rodeo in Calgary, Alberta, July 14, 2013. 

Snails crawl on the face of a woman during a demonstration of a new beauty treatment in central Tokyo, July 17, 2013. 

Dan McManus and his service dog Shadow hang glide together outside Salt Lake City, Utah, July 22, 2013. McManus suffers from anxiety and Shadow's presence and companionship help him to manage the symptoms. 

Laborers who work nearby nap on a road as cars drive past in Chongqing Municipality, July 23, 2013. 

A female dog feeds a 10-day-old tiger cub and her puppy at a zoo in Hefei, Anhui province, July 26, 2013. 

A man runs up the "gostra," a pole covered in grease, during the religious feast of St. Julian, patron of the town of St. Julian's, Aug. 25, 2013. In the traditional "gostra," a game stretching back to the Middle Ages, young men, women and children have to make their way to the top and try to uproot one of the flags to win prizes. 

Vadim Veligurov, 12, walks with "Abi," a wild sparrow, near his grandmother's house in the town of Minusinsk, Aug. 22, 2013. 

Numerous tents are seen during the 2013 International I Camping Festival in Mount Wugongshan of Pingxiang, Jiangxi province, Sept.14, 2013. 

A visitor looks at stuffed copulating hedgehogs displayed at the exhibition "Sex and Evolution" at the Natural History museum in the western city of Muenster, Oct. 17, 2013. 

A photographer takes pictures of Fang Jing in a wedding gown next to her husband, surnamed Zhao, as they hang from a cliff during a rock climbing exercise in Liuzhou, Guangxi Zhuang Autonomous Region, Oct. 26, 2013. 

Argentine artist Leonardo Erlich is seen in a reflection as he poses with Argentina's ambassador to the United Kingdom, Alicia Castro, on his optical illusion installation "Dalston House" in east London, June 26, 2013. 

Artists hanging on ropes perform at the opening ceremony of a yacht club, which is part of the Avaza resort, on the Caspian Sea in western Turkmenistan, June 29, 2013. 

A devotee of the Chinese Bang Neow Shrine with two pistols pierced through his cheeks takes part in a street procession during the annual vegetarian festival in Phuket, Oct. 10, 2013. 

Saudi youths demonstrate a stunt known as "sidewall skiing" in the northern city of Hail, March 30, 2013. 

A breeder, whose business has been affected by the H7N9 bird flu virus, walks his ducks along a road in Changzhou county, Shandong province, April 24, 2013. 

U.S. President Barack Obama makes light of his wife's new bangs with a mock picture of himself with the same hairdo in this humorous photo created by the White House shown at the annual White House Correspondents' Association dinner in Washington, April 27, 2013. 

A deflated Rubber Duck by Dutch conceptual artist Florentijn Hofman floats on Hong Kong's Victoria Harbour, with the island skyline looming at the background, May 14, 2013.

People wearing a white cloth take part in "Divisor," a performance art piece by Brazilian artist Lygia Pape, during the exhibition entitled "A Journal of the Plague Year. Fear, ghosts, rebels. SARS, Leslie and the Hong Kong story" at Hong Kong's financial Central district, May 17, 2013.