Amazing what you can learn on Twitter. Peter Freuchen freed himself with frozen feces.
I'm doing homework about polar explorers with my son, who has just described the revelation that Peter Freuchen (pictured, left) dug his way out of an ice cave with a chisel made out of his own frozen turd as "the best fact I have ever heard in my life." pic.twitter.com/tN4AbBDVBN