People pose for a photo with certificates after swimming in the ocean for the 121st annual Coney Island Polar Bear Club's New Year's Day plunge at Coney Island beach in the Brooklyn borough of New York, New York, USA, 01 January 2024. (Photo by Sarah Yenesel/EPA)

A child puts his swimming goggles on before jumping in a public pool of spring water in Japakeh, Indonesia's Aceh province on March 22, 2024, during the World Water Day. (Photo by Chaideer Mahyuddin/AFP Photo)

Norway's Casper Ruud jumps in a swimming pool after winning the Barcelona Open in the final match against Greece's Stefanos Tsitsipas in Barcelona, Spain, on April 21, 2024. (Photo by Albert Gea/Reuters)

Team Kazakhstan throw Zhaklin Yakimova of Kazakhstan into the air while they perform their routine in the Mixed Team Acrobatic during the World Aquatics Artistic Swimming World Cup 2024 - Stop 2 at Aquatics Centre on May 05, 2024 in Paris, France. (Photo by Adam Pretty/Getty Images)

Musicians play as bathers run into the chilly waters of English Bay while celebrating New Year's Day with the Polar Bear Swim in Vancouver, British Columbia, Canada on January 1, 2024. (Photo by Chris Helgren/Reuters)

Spectators jump in a makeshift swimming pool set up along the race route as the pack of riders (peloton) cycles past, during the 9th stage of the 112th edition of the Tour de France cycling race, 174.1 km between Chinon and Chateauroux, central France, on July 13, 2025. (Photo by Marco Bertorello/AFP Photo)

National Geographic photographer Steve Winter has spent most of his adult life shooting wild cats. Photo: A 14-month-old cub, cooling off in a pond, is riveted by a deer that appeared near the shore. Tigers are powerful swimmers; they can easily cross rivers four to five miles wide and have been known to swim distances of up to 18 miles. (Photo by Steve Winter/National Geographic)

National Diving School director Jerome Vincent, wearing a Gandolfi space suit, executes training procedures in a swimming pool in Marseille October 22, 2014. The underwater test session develops European expertise in spacewalk simulations under partial gravity for exploring the Moon, asteroids and Mars.The training is organised by Comex, a French company specializing in engineering and deep sea diving operations, in collaboration with the European Space Agency (ESA) and with Apollo XI “Under the sea”. (Photo by Jean-Paul Pelissier/Reuters)