Sir Ernest Shackelton's expedition to Antarctic is one of the most unbelievable survival stories ever recorded. Endurance drifted for months stuck in the pack ice of the Weddell Sea. The changing conditions of the Antarctic spring brought such pressure that Endurance was crushed on the morning of November 21, 1915, the Endurance's began to sink under the ice and she was abandoned. To Shackleton's credit he did not lose any of the 28 men of the crew.