The British Film Institute (BFI) has restored footage taken during Ernest Shackleton’s Imperial Trans-Antarctic expedition, including the poignant moment the ship's mast collapses as Endurance is crushed by sea ice. Despite the sailors' perilous predicament, Shackleton insisted the nitrate film was salvaged. The remastered work is part of a collection depicting early 20th century Antarctic exploration, available on Blu-ray and DVD from Feb 28.