Fridtjof Nansen was an explorer, scientist, sportsman, diplomat, and humanitarian as well as one of the most interesting people you’ve never heard of. He was the first man to traverse Greenland’s interior, traveled closer to the North Pole than anyone in his day, broke national cross-country skiing records, was a leading researcher of neuroanatomy, and created an internationally-recognized passport for stateless refugees. To top it all off, he had one fantastic mustache.