Polar explorers made skis known internationally and demonstrated their unique merits on terrain that shadow rs are inter in Ing tho ang an nd fire d exp ber o ter could not be crossed any other way.Fridtjof Nansen crossed the Greenland interior on skis in 1880.Annual cross-country events are on F throughout Norway, attracting a gre of participants.Other explorers have followed the routes used by these two famous explorers and skied to both the North and South Poles.