Very interesting article.
If it was a comet it’s still out there. I wonder when it’s due to return?
Can we hope for california next?
Not sure. Is this implying that the comet itself entered the atmosphere and was destroyed causing massive damage. If so, it will not be back
Not if the comet exploded in an air bust over Michigan 1,500 years ago.
The disappearance of the "Mound Builder" Culture, named Adena here in Ohio, may have been misdated to the first century AD. Perhaps this later event was the actual cause. The Snake Mound near Chillicothe is particularly unique.