Okay first of all I'm saying I can't believe any culture or people anywhere ever has a detailed history of their ancestral habits 12,000 years ago, at least prior to modern anthropology. It's not a slight on Native Americans specifically.
For context, the Epic of Gilgamesh from Mesopotamia, generally regarded as the world's oldest surviving literature, is 4,000 years old.
I would genuinely love to see a source about this 80,000 year old oral history. I admit to being sceptical.
Secondly, it's not under an article about Mammoths existing 5,000 years ago. It's under a meme. A wrong meme.
I've thrown out 1 number, not 2. 12,000 years ago, or 10,000 BC. This is the same. It's also when Mammoths went extinct. I am consistent on this.