Paradise lost from National Geographic

The Hadza people.

...
Sure enough, three weeks later, when my interpreter and I arrived by Land Rover in the bush, there was Onwas's son Ngaola waiting for us. Apparently, Onwas had noted the stages of the moon, and when he felt enough time had passed, he sent his son to the tree. I asked Ngaola if he'd waited a long time for me. "No," he said. "Only a few days."

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