A scientific expedition will next year try to find the Endurance, the ill-fated ship of Antarctic explorer Sir Ernest Shackleton. The vessel sank in 1915, crushed by sea-ice in the Weddell Sea and lost in 3,000m of water. Shackleton and his crew were forced into lifeboats to make an extraordinary and heroic escape across the Southern Ocean. UK researcher Prof Julian Dowdeswell will lead the international effort. (BBC News)