British swimmer Lewis Gordon Pugh, dubbed the “human polar bear,” has completed the first-ever swim under an ice sheet in Antarctica. Jeff Semple explains how Pugh did it to raise awareness of climate change, and the dire threat facing Antarctica.

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Production engineer and certified swim coach. Full-time IT consultant, spare-time swimming aficionado. 2 sons, 2 daughters and a wife. President of the Faroe Islands Aquatics Federation. Likes to run :-)

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