Colin O'Brady
United States
American Colin O'Brady completed an unsupported solo crossing of the Antarctic continent on foot in 54 days during November-December 2018. He covered more than 1,500 km on skis, hauling a 170 kg sled through temperatures as low as -40 degrees C, averaging roughly 28 km per day. No human had previously completed an unsupported solo Antarctic crossing, though some controversy surrounds the exact definition of "unsupported" in this context.