Ernest Shackleton’s doomed Endurance wasn’t built to handle polar ice — and he knew it, new analysis finds

When explorer Ernest Shackleton’s ship, Endurance, got trapped in pack ice, a broken rudder was blamed. New analysis suggests structural weakness caused the sinking.

​ When explorer Ernest Shackleton’s ship, Endurance, got trapped in pack ice, a broken rudder was blamed. New analysis suggests structural weakness caused the sinking. Read More Breaking News, Latest News and Videos | CNN