The South end of South America
Dr. Darwin met aboriginal inhabitants.

"People in Tierra del Fuego were suspicious of me at first. But after I gave them a red cloth, we were getting intimate. An old man tapped on his chest with his palm. I mimicked him and he was very pleased."
Dr. Darwin, who visited Tierra del Fuego in 1832, recorded that people wore only the skins of guanago and were almost naked.
When he found that the people did not get sick even after swimming in the ice-cold sea, he came up with an idea.
"Nature made inhabitants suitable to its severe climate and poor productions."