This story appears in the July 2017 issue of National Geographic magazine. It started with a husband, a wife, and their dog. In 2010 divers Ghislain Bardout and Emmanuelle Périé-Bardout took ...

Rian and Maya begin their journey at the North Pole, learning as they go how animals have been used for travel and transport. Rian: Aunt Maya, I can't believe we're going to be travelling from one ...