This Ted Talk is presented by a man named Lewis, who explains his swim in the Arctic Ocean, and what inspired him to do so. He embarked on a swim 7 years ago, and loved the place so much that he returns regularly. However, his real point was that even in that short period of time, he's seen the place change beyond description, due to global warming. He describes his journey, and the courage he showed while performing this amazing feat. I was fascinated by his swim, and the beliefs that prompted him to do it. Here's the link for anyone interested.