If you read the articles linked the evidence that this "knowledge" has been passed down for 30,000 years is not strong. Firstly, the palms are native to Austral

If you read the articles linked the evidence that this "knowledge" has been passed down for 30,000 years is not strong. Firstly, the palms are native to Australia, just other populations are found 1000 km to the north. Secondly, the palms have only being separated for 15,000 years at most. Thirdly, the northern evidence is actually "gods brought the palms from the north".