Taking photographs while exhausted by lack of oxygen and cold and tired is impressive. Usually when I get to my physical limit and I am really cold I have to stop and will myself to get my camera out - but generally I am not at risk of death lately (when I was a boy I had a trapline and retrospectively that was dangerous compared to now with -50 and falling through ice etc)..
Congratulations on once in a life time photographs.
Super post Claude! Im traveling and missed this. Love looking at these Incredible images! The second one makes me tired looking at the task that lies ahead.