New Year's Day Polar Bear Swim in Vancouver, British Columbia.(Reuters/Ben Nelms)
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Revelers run into English Bay during the annual New Year's Day Polar Bear Swim in Vancouver, British Columbia. (Reuters/Ben Nelms)
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Revelers take part in the Coney Island Polar Bear Club's annual New Year's Day Polar Bear Swim in New York's Coney Island. (Reuters/Kena Betancur)
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A reveler poses for a picture as he takes part in the Coney Island Polar Bear Club's annual New Year's Day Polar Bear Swim in New York's Coney Island. (Reuters/Kena Betancur)
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Participants run from the frigid waters of English Bay as two people wear a shark costume during the 92nd annual Polar Bear Swim in Vancouver, B.C.(AP Photo/The Canadian Press, Darryl Dyck)
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Participants prepare to enter the frigid waters of English Bay during the 92nd annual Polar Bear Swim in Vancouver, B.C. (AP Photo/The Canadian Press, Darryl Dyck)
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Thalia Soriano reacts to the cold water while participating in the annual New Year's Day Coney Island Polar Bear Club swim in New York (AP Photo/Seth Wenig)
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A man holds his crying son after taking a dip in the frigid waters of English Bay during the 92nd annual Polar Bear Swim in Vancouver, B.C. (AP Photo/The Canadian Press, Darryl Dyck)
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Participants dressed in a shark costume take to the frigid waters of English Bay during the 92nd annual Polar Bear Swim in Vancouver, B.C. (AP Photo/The Canadian Press, Darryl Dyck)
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Participants take to the frigid waters of English Bay during the 92nd annual Polar Bear Swim in Vancouver, B.C.. (AP Photo/The Canadian Press, Darryl Dyck)