The peaks of the Trident Ridge rise to 4,400 feet. Photo: Mike Graber Printer-Friendly Format   Feedback Shackleton's Expedition | Surviving Antarctica | Explore Antarctic Islands Classroom | Resources | Transcript | Teacher's Guide Site Map | Shackleton Home Search | Site Map | Previously Featured | Schedule | Feedback | Teachers | Shop Join Us/E-Mail | About NOVA | Editor's Picks | Watch NOVAs Online | To Print PBS Online | NOVA Online | WGBH © | Updated March 2002