http://nuclearchange.i2p/catalog.html?add=&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Binclude_default=true&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Brem=&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bpage=1&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bpage=2&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bpage=1&amp%3Bamp%3Bamp%3Bamp%3Bpage=2&amp%3Bamp%3Bamp%3Bpage=1&amp%3Bamp%3Bpage=2
I don't want to make some claim about aliens or whatever, I don't take it that far, but for me, basically, anatomically modern humans have been around for 200,000 years, and we have history for like 5000 of that, and solidish info on 10,000 of that tops.
There is a lot of evidence for fairly complex civilisations for long before that, and it keeps getting revealed to be older and older, and more complex as it gets older.