"I am anxious for you and the boy's future — make the boy interested in natural history if you can, it is better than games — they encourage it at some schools — I know you will keep him out in the open air — try and make him believe in a God, it is comforting. Oh my dear my dear what dreams I have had of his future and yet oh my girl I know you will face it stoically..." Whatever his flaws, this is a remarkable piece of writing; Scott's final letters to his wife, as his Anatarctic expedition reached its close. Very sad.

"The Russian surgeon Leonid Rogozov’s self operation, undertaken without any other medical professional around, was a testament to determination and the will to life." Rogozov was the surgeon on a Soviet Antarctic expedition, on the ice for a year. When he developed appendicitis, his only choice was to operate... on himself. This remarkable BMJ article draws on his diary to explain what happened. (There are two moderately icky photographs, should you not like that sort of thing).

"During Condition 1 weather, winds gust at speeds of anywhere from 50 to 60 MPH and the wind chill hits anywhere between 75° F to 100° F below zero. Ouch. Not surprisingly, personnel are prohibited from leaving their buildings during these storms." Which gives them ample time to make videos like this.