Sir Ernest Henry Shackleton, Anglo-Irish Antarctic explorer who leads three British expeditions to the Antarctic, is born on February 15, 1874, in Kilkea, County Kildare. He is one of the principal figures of the period known as the Heroic Age of Antarctic Exploration.

Shackleton is the second of ten children and the first of two sons. His father, Henry Shackleton, tries to enter the British Army, but his poor health prevents him from doing so. He becomes a farmer instead, settling in Kilkea. Shackleton’s mother, Henrietta Letitia Sophia Gavan, is descended from the Fitzmaurice family. His brother Frank achieves notoriety as a suspect, later exonerated, in the 1907 theft of the so-called Irish Crown Jewels, which have never been recovered.

The Shackleton family moves to Sydenham, London when he is ten. His first experience of the polar regions is as third officer on Captain Robert Falcon Scott‘s Discovery Expedition of 1901–04, from which he is sent home early on health grounds, after he and his companions Scott and Edward Adrian Wilson set a new southern record by marching to latitude 82°S. During the Nimrod Expedition of 1907–09, he and three companions establish a new record Farthest South latitude at 88°S, only 97 geographical miles from the South Pole, the largest advance to the pole in exploration history. Also, members of his team climb Mount Erebus, the most active Antarctic volcano. For these achievements, he is knighted by King Edward VII on his return home.

After the race to the South Pole ends in December 1911, with Roald Amundsen‘s conquest, Shackleton turns his attention to the crossing of Antarctica from sea to sea, via the pole. To this end, he makes preparations for what becomes the Imperial Trans-Antarctic Expedition, 1914–17. Disaster strikes this expedition when its ship, Endurance, becomes trapped in pack ice and is slowly crushed before the shore parties can be landed. The crew escapes by camping on the sea ice until it disintegrates, then by launching the lifeboats to reach Elephant Island and ultimately South Georgia island, a stormy ocean voyage of 720 nautical miles and Shackleton’s most famous exploit.

In 1921, Shackleton returns to the Antarctic with the Shackleton–Rowett Expedition on a 125-ton Norwegian sealer, named Foca I, which he renames Quest. When the party arrives in Rio de Janeiro, he suffers a suspected heart attack. He refuses a proper medical examination, so Quest continues south, and on January 4, 1922, arrives at South Georgia. In the early hours of the next morning, Shackleton summons the expedition’s physician, Alexander Macklin, to his cabin, complaining of back pains and other discomfort. According to Macklin’s own account, he tells Shackleton he has been overdoing things and should try to “lead a more regular life,” to which Shackleton answers, “You are always wanting me to give up things, what is it I ought to give up?” “Chiefly alcohol, Boss,” replies Macklin. A few moments later, at 2:50 AM on January 5, 1922, he suffers a fatal heart attack. At his wife’s request, he is buried there.

Away from his expeditions, Shackleton’s life is generally restless and unfulfilled. In his search for rapid pathways to wealth and security, he launches business ventures which fail to prosper, and he dies heavily in debt. Upon his death, he is lauded in the press but is thereafter largely forgotten, while the heroic reputation of his rival Scott is sustained for many decades. Later in the 20th century, Shackleton is “rediscovered”. He rapidly becomes a role model for leadership as one who, in extreme circumstances, kept his team together in a survival story described by cultural historian Stephanie Barczewski as “incredible.”

In his 1956 address to the British Science Association, Sir Raymond Priestley, one of his contemporaries, says “Scott for scientific method, Amundsen for speed and efficiency but when disaster strikes and all hope is gone, get down on your knees and pray for Shackleton,” paraphrasing what Apsley Cherry-Garrard had written in a preface to his 1922 memoir The Worst Journey in the World. In 2002, Shackleton is voted eleventh in a BBC poll of the 100 Greatest Britons.