There in fact may be many primitive methods to do what is seen here we don’t know about.
I had to laugh at how deftly Christopher Dunn got around a question/statement by Giorgio Tsoukalos. They were looking at some ancient artifact that looked machined and Tsoukalos tried to get Dunn to agree that it was made by aliens. Dunn replied that "It looks to be fashioned by machinery we have not yet discovered". That's what I believe.
We are told that homo sapiens has been on earth for at least 200,000 years, and that they had the same brain as we do today. That leads me to believe that higher civilization have existed and were wiped out in cosmic disasters. If 95% of humanity was killed today, how long would it take the survivors to come back to our present stage?
We are told that homo sapiens has been on earth for at least 200,000 years, and that they had the same brain as we do today. That leads me to believe that higher civilization have existed and were wiped out in cosmic disasters. If 95% of humanity was killed today, how long would it take the survivors to come back to our present stage?
Well put. Human civilization probably got to the point of literacy, at least, before the most recent big glaciation, or somehow during it (in that case, along the water's edge, on what is now the continental shelf), had to crawl back up after the relatively sudden mass-melting of the glaciers flooded back into the oceans, and long distance trade by land (and the easier type, by sea) continued or resumed no longer ago than the Neolithic. I've got to get my Mary Settegast graphic back up (it died with TinyPic) -- it shows the apparently related 'runic' writing systems, which are found in various forms, including among the cave paintings.