I grew up swimming in the warm waters of the Pacific. I hate the cold. Yet when it came time to do a polar dive, I surprised myself by leaping feet-first off a platform into the most freezing water on Earth. I didnâ€™t even blink at the opportunity, but when my body hit the water, I screamed. I drifted for a bit before realizing how cold the water really was, and then I scrambled back to the boat.
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