posted on Nov, 27 2011 @ 03:12 PM
Originally posted by ADMX101
Ever wonder if the world just goes on like it is now for a million or two years then theres a technology revolution around the time 99% of the earths
population gets wiped out by a natural or man made disaster? Followed by about 100 million years of just thousands of people repopulating the planet
and becoming civilized again. This could have happened several times in the 4.5 billion years earths been around...
Paleontology shows a continuous chain of hominids until Homo sapiens evolved in Africa 200,000 years ago. Molecular genetics confirms our common
ancestor lived in Africa 200,000 years ago. This constrains the time we have to look for cyclic civilizations to only 200,000 years, not millions of
years. Two hundred thousand is much easier to look into, and we have...
Archaeology: No evidence of human civilization before ca. 10,000 BC; no megaliths, strip mines, Mount Rushmores, nuclear waste dumps, etc. If we admit
the pre-civilized cultures as civilizations, we can push the date back, but evolution of civilizational complexity is pretty continuous--there is no
evidence of industrial civilizations before our own.
Ice cores: No evidence of a hydrocarbon economy before ours.
Writing: We have artifacts from every period of the human race, but no (proto-)writing before about 5000 BC--no writing in caves, no writing on
statues, no writing on tools. When you consider the ubiquity of the written word, it seems unlikely that an advanced civilization would leave no trace
of writing and not pass writing on to their successor civilization.
Conclusion: All of this hasn't happened before.