What an imagination...I like it. They said they recovered cloth/clothing that was as finely woven as present day T-shirts....unheard of for that time, anywhere in the world.
As to what was their ultimate fate, remember the Carolina Bays? (Impact Craters)
and they are **firing the earthenwhere before 6000.
Advancement in culture is probably divergent ...some areas having social groups with limited skill application...
while elsewhere...others are advancing in quicker incriments.
Catastrophism could have knocked mankind back several times...and why we find these garments and pottery idents which do not fit..but RCY/BP as ..and are sure wrenches into the machinery.
one could hypothesis that there just might be one or a few places on Earth where mankind flourished..and stayed seperate from the 30,000-12,000 paleo crowd.
what could be their level of advancement if they where not cut back for several thousand years.
We have the academic data for migrations..the 5MTDNA links..dental...lingustic.
but so to a rich mythology of *Teacher/helpers....visitors from where?
on the mythology thingy..we have 2 tracks..
Erik Von Daniken..the Hebrew account....*OFF World contact.
or the concept of an advanced social net of mankind..sent into migration via catastrophism..they are the teacher/god helpers of old..and established societies from Paleo roots.