An especially comforting nineteenth-century origin story speculated that Indian mounds were actually built by

An origin story speculates that the Indian mounds were built by an ancient civilization called Adena.

The Adena people are considered an ancient native society. They are classified as Mound Builders. They are believed to have lived in the Ohio River Valley 400 years ago b.c.

Although this is a very old civilization, much research has been done on the Adenas. It is currently known that:

You can find more information about this in the ink below:

answer; migrate from a region;