Hope. Progress. Crushing setback. Hope. Progress. Crushing setback.

These could have been the journal headings of Ernest Shackleton. He set out to be the first man to cross Antarctica. Instead, his ship lodges in the ice before the expedition reaches its starting point. He and his team spend almost 500 days camped on frozen sea. The expedition must be abandoned. How does Shackleton lead his team to survival? Read the rest here.