This reminds me of a short story about Earth being flung from the solar system by a rogue star. People survive, and one family in particular survives by boiling frozen oxygen 'snow' over a fire.
Feynman's friend Ralph Leighton wrote about Felnman's long-standing desire to go there [1]. The BBC Horizon programme had an episode called "The Quest for Tannu Tuva" [2] which might be on youtube.
Los Alamos, Argonne, and Tana Tuva.
Was Tana Tuva a topic of discussion during this time period? I remember Richard Feynman wrote quite a bit about it, too.