steve_bank
Diabetic retinopathy and poor eyesight. Typos ...
I watched a show on a genetic study mapping the paths out of Africa. There were a few unexpected surprises, but the paths are mapped. That trumps speculation.I remember seeing an account of Thor Heyerdahl's expedition from my childhood. A very interesting experiment. TH and his fellow adventurers made a raft from balsa-tree logs, the Kon-Tiki, and sailed it from the west coast of South America to the Polynesian islands.
But it's very evident from genetic and linguistic evidence that Polynesians came from the west, the islands off of Southeast Asia, not the east, the west coast of South America.
As to the word *kumala ~ *kumara for sweet potato (Ipomoea batatas), it traveled with the vegetable, making it a wander word.
Entries for KUMALA.1 [PN] Sweet Potato (Ipomoea): *ku(u)mala in Polynesian Lexicon Project Online - "It is possible that all forms outside of EP are borrowings as there are no early references to the plant in western Polynesia."
Maori kūmara - Wiktionary, the free dictionary - Tongan kumala - Wiktionary, the free dictionary - Hawaiian ʻuala - Wiktionary, the free dictionary - Quechua kumar - Wiktionary, the free dictionary
The Hawaiian form has a sound shift relative to most other Polynesian forms: /k/ -> /'/ (glottal stop):
Maori kūmara ~ Hawaiian ʻuala (sweet potato)
Maori koe ~ Hawaiian 'oe (you singular)
Maori koutou ~ Hawaiian ʻoukou (you plural)
Appendix:Oceanic Swadesh lists - Wiktionary, the free dictionary and Appendix:Austronesian Swadesh lists - Wiktionary, the free dictionary
So eastern Polynesians got the sweet potato before they colonized Hawaii with the colonists changing /k/ into /'/.
This suggests a scenario of some Polynesians making it all the way to South America, but finding a lot of people there, and not founding a colony there because of all those people. But from these people, they acquired sweet potatoes and a word for them, and they then returned westward with these vegetables to their fellow Polynesians.
There was speculation on how humans crossed the Shara to get north. Relatively recently a cave was found in the Sahara with cave drawings depicting the Sahara as being green with wildlife,
Humans spread by walking or sailing. We still do. People row solo across the Atlantic. Captain Bligh's famous feat of navigation in a small boat across open ocean to reach an island after being set adrift by the Bounty mutineers.
That the Atalmtic and Pacific were crossed to the Americas to me is likeley.
An ancient human was found high in the Alps frozen. His clothes were layered leathers stuffed with vegetation for insulation and he had a kit to male weapons. What was he doing way up there? Dated around 3230 BC. The reconstruction of his clothes is interesting.
Ötzi - Wikipedia
en.wikipedia.org