Antarctic Weddell expedition targets Shackleton's lost ship

A scientific expedition in the Antarctic has set out on a quest to find Sir Ernest Shackleton's lost ship. The team has spent the past two weeks investigating the Larsen C Ice Shelf and the continent's biggest iceberg, known as A68. And this puts it just a few hundred km from the last recorded position of the famous British explorer's vessel, the Endurance. The polar steam-yacht was crushed in sea-ice and sank in November 1915. Shackleton's extraordinary escape from this loss, saving his crew, means there is considerable interest in finding the wreck.