What was the physics of the Blackfoot?
This is a great question. This is the work of a Western physicist who seeks to interact with a more ancient Indian culture in Alberta Canada. The name of this physicist is F. David Peat. In other words, we can say that the work of David Peat is the combination of modern science and the worldview of the Native Americans.
In light of this, David Peat started extensive dialogues with Native elders. The work, Blackfoot Physics, is the fruit of his discoveries and insights. It can be seen as an interesting interaction among history, cultural anthropology, physics, cosmology, and sociology, not to mention the synthesis of old and new worlds. Peat looks at the details of the worldview of the Natives - language, mythology, stories, traditions, ways of doing things, and the like. Unsurprisingly or surprisingly he finds a lot of overlap between modern science and the Natives.
Anyone who studies the ancient world will find lots of overlap. For example, the Roman poet Lucretius wrote about atomic theory 2000 years ago.