An American explorer just became the first person to cross Antarctica alone and unaided, finishing with an 'ultramarathon': Photos show his spectacular 932-mile journey - Business Insider

An American explorer just became the first person to cross Antarctica alone and unaided, finishing with an 'ultramarathon': Photos show his spectacular 932-mile journey  Business InsiderColin O'Brady just crossed Antarctica alone, with no help and no resupply. Nobody has ever survived such a trek before.