Continuing with America before: The Key to Earth’s Lost Civilization By Graham Hancock

...FROM THE CITY OF MANAUS, at the heart of the Amazon River basin in South America, it’s a journey of about 6,000 kilometers by air to reach the city of St. Louis in the heart of the Mississippi River basin in North America. On the way you’ll cross the Equator and the Tropic of Cancer. Google informs me that the flight time will be about 11 hours, including a stopover in the Dominican Republic.

It wasn’t so simple in the ancient world. Although sections of the journey could have been made by sea most of the route would have been overland through some geographically very challenging parts of Central America and involving, ultimately, much more than 6,000 kilometers.

This is not to say that such a great distance must necessarily have ruled out any communication and interchange between the two regions. On the contrary, it is not in dispute that the peoples of South and North America are more closely related genetically to each other than they are to anyone else, that there are some linguistic connections, and that crops such as maize or manioc that had been domesticated in one region were also grown in the other—though sometimes with a significant time lag. In summary, the evidence confirms that there were contacts but it also suggests that they were random and infrequent rather than regular and sustained.

What, then, are we to make of the fact that stunningly similar earthworks repeating stunningly similar geometric themes on a stunningly similar scale to those of the Amazon River basin are also found in the Mississippi River basin?

Are the resemblances coincidental?

Or did they arise during one of the random and infrequent episodes of contact?

Or is there some other explanation?
https://exploringrealhistory.blogspot.com/2020/10/part-7america-before-key-to-earths-lost.html