In an observance of Epiphany, Russian Orthodox believers swim in an icy pond outside Nizhny Novgorod, Russia. (Photo by Olga “Zwezdochka”)

Havilland Mosquito KA 114 performs a low pass during an airshow commemorating the completion of its rebuild on September 29, 2012 in Ardmore, New Zealand. The plane was restored by Warbird Restorations at Ardmore Aerodrome and is the only flying Mosquito in the world. (Photo by Simon Watts)

Jonathan Miller, sweet grocery buyer and bee hive designer, checks the bees on the roof at Fortnum and Mason on July 22, 2008 in London. (Photo by Peter Macdiarmid/Getty Images)

Elephant Maja of Circus Bush on his daily walk with Circus ringmaster Hardy Scholl (R) on Berlin streets in Berlin, Germany June 30, 2016. (Photo by Stefanie Loos/Reuters)

Patients from Rady Children's Hospital hug a bottlenose dolphin after being invited to swim and interact with dolphins at Sea World in San Diego, California August 27, 2015. Sea World has hosted Dolphin Interaction Program for seven years. It was started by dolphin trainer Joy Soto who battled and overcame non-Hodgkin’s lymphoma. (Photo by Mike Blake/Reuters)

Smithsonian National Zoo biologist Leigh Pitsko releases a male lion cub for its swim test in the zoo habitat moat, in Washington May 6, 2014. Four, unnamed ten-week old lion cubs were tested today for their ability to swim and remove themselves from their zoo habitat moat. (Photo by Gary Cameron/Reuters)

Crampus from Netherworld Haunted House with Amber Thompson, spa staff, at Bliss Spa at W Atlanta Downtown hotel on Thursday, October 7, 2014. A self-guided, dark attraction known for its over-the-top special effects, intense make-up, costuming and stunt actors as well as unique monsters, unusual themes and chilling detail, Netherworld Haunted House in Atlanta is taking over the Halloween holiday this season for its 18th season. (Photo by Hyosub Shin/AJC)