In 1915 Ernest Shackleton had been ice bound for a year during his Antarctic expedition.

Out of desperation and near starvation, some of his men went hunting, but for one of them, the tables were turned, when he was attacked by Antarctica's most dangerous predator, the huge leopard seal.

He desperately tried to escape but the seal's razor-sharp teeth were getting ever nearer. The full exciting story will be in John's new book, "Legendary Hunters and Explorers, due out later this year. The story will also be previewed in an upcoming issue of Sporting Classics magazine.