endured by the first british antarctic explorers like scott, and shackleton and norwegian amundson and the lengths of time they endured them, are well, horrifying to imagine. they made their journeys in wooden ships, then man hauling equipment across glaciers, ice floes, mountains and frozen seas surviving on penguin meat when rations ran out. >> ryan: you might start to smell some sulfur. you smell it? >> anthony: yeah i smell that sulfur. what's our altitude now? >> ryan: 13, two. >> anthony: about 22 miles from mcmurdo is cape royds, where a penguin colony of about 2000 breeding pairs live. marine ecologist, dr. david ainley, has been