who is he?

He was an Anglo-Irish explorer. Born in Kilkea, Ireland, Shackleton was a member of four Antarctic expeditions, three of which he led. After the Nimrod Expedition, 1907?09, he was knighted for his achievement in establishing a record furthest south latitude at 88�23'S, 97 nautical miles (180 km) from the South Pole.

this is taken from wikipedia