I am reading a book about it right now and as I learn more it seems too crazy and unbelievable to sustain (and im quite gullible person), especially part about living on full ocean in small boats with no food, water and heat, in extreme cold, still travelling those 100s of kilometers.
There was a part that stuck with me, a journal entry that described the Endurance crew standing on a ice that had trapped their boat, and just watching in horror as the shifting ice flow crushed it. It powerfully conveyed raw despair and overwhelming hopelessness, which in an of itself is exceedingly difficult for anyone to overcome, let alone in extremely hostile conditions.
