Captains Calum Ramm, left, and Daniel Cartica, right, cross a finish line during the World Marathon Challenge Jan. 23 at Union Glacier, Antarctica. The World Marathon Challenge is a seven-day event that encompasses seven marathons run on every continent. Cartica won the event with a cumulative time of 24 hours, 46 minutes and 56 seconds. - Captains Calum Ramm, left, and Daniel Cartica, right, cross a finish line during the World Marathon Challenge Jan. 23 at Union Glacier, Antarctica. The World Marathon Challenge is a seven-day event that encompasses seven marathons run on every continent. Cartica won the event with a cumulative time of 24 hours, 46 minutes and 56 seconds.