What Do Stonehenge and Japanese Stone Circles Have in Common?

[wnylib]

8. Vikings lived thousands of years later than

the inhabitants of Britain and Japan in the OP.

"Perhaps" is fun speculation. But without corroborating evidence, it is just speculation and free floating imagination, not science.

The Vikings even reached Canada, but only 500 years before the Columbus voyage to the Caribbean. By their own records, the Vikings were in Vinland very briefly and could not establish a foothold. They were driven out by the "Skraelings" (their term for the Native inhabitants). They did trade with them but it was a very limited trade farther north around Baffin Island.

The Polynesians did reach the coast of Peru according to recent DNA studies, but not in ancient times. I do not recall the dates offhand, but somewhere after 1000 CE. That is about 3000 years after the earliest civilization in Peru at Caral. And, although the Polynesians are the greatest navigators in the world, they did not have any aspects of civilization to bring with them to Peru, which was already advanced beyond the Polynesians. In fact, there is some evidence that Polynesian contact with Peru apparently spread maize to parts of maritime Asia, carried back home with them.

That Polynesian contact left evidence in DNA and in maize. The Viking contact left evidence in Newfoundland.

There is no evidence that any of the civilization developments in the Americas came from any place but America, independent of other parts of the world.