A polar bear's insulating fur shown under infrared heat imaging taken with a FLIR E75 24o (FLIR Systems OÜ, Estonia) Svalbard Archipelago, Norway.

People plunge into freezing Lake Michigan during Chicago Polar Bear Club 24th annual Polar Plunge event at Oak Street Beach on Jan. 25, 2025.

AUSTIN (KXAN) — While some Austinites dipped their toes into 2025, others dove head first as part of the annual Barton Springs Polar Bear Plunge ... Alliance said. The free event kicked off ...

Revelers in costumes get their photo taken before they enter the cold water during the annual Polar Bear Plunge on New Year’s Day, Wednesday, Jan. 1, 2025, in New York. Pat Leonard: With Titans ...