Originally posted by IvanZana
Besides, if there were advanced humans 30,000-20,000+ years ago, how would you be able to tell their advancement by their bones? Tools you say? In africa you have modern cities while hundreds of kilometers away you have peoples living like they did 5000 years ago.
If in 20,000 years from now we lost our history, lets hope they dont dig somewhere in brazil or africa or they would think that around 2000 a.d humans were still using spears and living in huts.
Not really. Our roads and cities make permanent changes in the landscape, as does agriculture and mining efforts. We get lots of information from garbage pits and houses (people lose things in the house and the house decays... we find tools and other things that survived when their human owners crumbled to dust.)
We find campsites of humans 30,000 years ago (and much longer ago.) We find living areas that are 100,000 years old (remains of fire, jewelry, tools, bone of animals they killed, etc.)
An advanced civilization doesn't just suddenly show up out of nowhere -- just as an adult human doesn't suddenly appear out of thin air complete with computer and cell phone. That human had a mother and a father and grandparents and so forth and had a long childhood although they may not remember it. Genetic testing can link them to several groups.
Same with civilizations. If there's an advanced one, it came from not-so-advanced ones.
That said, I wouldn't be surprised to find some stone age/early bronze age peoples with a sophisticated culture and the date of "civilization" pushed back even as far as 15,000 years. But I'd be darn surprised to find electronics and high tech manufactured ceramics of that time period.


