Why I carried a sandwich to the South Pole

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Australian Jade Hameister has completed what's known as the polar hat-trick and she's still a teenager. At fourteen Jade traversed the Arctic to the North Pole, then a year later crossed the world's largest ice cap in Greenland and then finally this year finished a 37-day expedition through the Antarctic to the South Pole and she took a special sandwich with her. (Archive from TEDxMelbourne) Image: Jade Hameister at the South Pole Credit: WTFN Entertainment