The Iñupiat families who declined to go to Wrangel Island in 1921 had made an informed decision with that knowledge.

The four young men who went without it died.

Ada Blackjack, who went with partial access to it and the capacity to learn more under pressure, lived.

What this story reveals about human adaptation to extreme environments is something that the convergence of modern anthropology, ecology, nutrition science, and climate research has confirmed from multiple directions: that the knowledge systems Indigenous peoples developed for surviving in environments like the Arctic represent some of the most successful human adaptation in history — achievements of empirical learning that Western science spent centuries dismissing as superstition before eventually confirming they were right.

Ada Blackjack walked off a rescue ship in Nome, Alaska, in August 1923, wearing a reindeer parka she had sewn herself, carrying moccasins she had made for her son.