In this essay, longtime friends, collaborators, and adventurers Adam Falkner and Michael George chronicle a recent journey to Antarctica. DRAKE PASSAGE (59°55'S 64°17'W) We are 250 miles from the southern tip of Argentina — the most dangerous passage on earth. Still a full day’s voyage from land, our GPS dot is a blinking blue pebble in the center of a nautical screen, and “the bridge,” as it’s called, is silent.