Growing up on a farm in Ireland, Ernest Shackleton longed for a life of travel and excitement.His father wanted him to become a doctor, but Shackelton's sense of adventure led him to a career as a sailor.After years of sailing with the British Merchant Navy, he was asked to join an expedition to Antarctica.Shackleton had found his life's passion.One of the most inhospitable and dangerous places on Earth, Antarctica drew Shackleton south four times.From...