Well I have pondered this question because as an avid follower of the latest archaeological news (I know GEEK). I have always found genuine reports of findings or discoveries that push the date of the existence of Humans or at the least the existence of civilised settlements back, past those dates currently accepted. And these unusual reports are awfully fascinating and few and far between, but baffling due to the limited exposure given in the mainstream media.
I occasionally visit a site, that lists all the latest finds as published by reputable news agents: See here for yourself if you wish - http://www.archaeologica.org/NewsPage.htm
And every so often, comes a report or finding as mentioned above that questions or reveals a possible alternative to our current theory, and again proves how little we know for sure. Below are a few examples of the ever growing evidence. Because remember our current estimated period of beginnings as relatively civilised human beings is still just a theory, not undeniable fact.
In the below link, scientists may have discovered evidence to suggest that the DNA of a 24,000 year old skeleton
appears to indicate that one-third of his/her ancestry can be traced back to Europe, while nearly 30 percent of modern Native Americans’ ancestry also came from the skeletons gene pool. “Though our results cannot speak directly to this debate, they do indicate Native American ancestors could have been in Beringia — extreme north eastern Russia and Alaska — any time after 24,000 years ago and therefore could have colonized Alaska and the Americas much earlier than 14,500 years ago, the age suggested by the archaeological record. Another example of evidence that could turn the archaeological world on its head, and push back our current theories and ideas of how old we actually are.
Now, when I saw the video shown below. I must say I was intrigued and very much interested due to my already growing suspicions. The video details the press tour and then ideas of research theories presented by a Michael Cremo, an archaeologist member of numerous well respected archaeological organisations and societies. In presenting his book - Where he details and looks at the possibility that there were previous advanced human civilisations on earth. With countless references to discoveries over the last 150 years to back up his claims. And how the Scientific community has covered up, or suppressed the theories identified by numerous scientists, including Cremo. Unfortunately, instead of acknowledging the amazing find for what it is, scientists have tried to fit it into pre-conceived notions of human evolution.
Watch the video below, and consider the possibility. I for one cannot without a doubt say we know exactly how old we really are, and I know that modern day archaeologists also cannot, there theories are just that, theories. Have an open mind, but don't accept it as fact either.
These are just a few of the countless articles, discoveries and or alternative theories that all suggest the same thing. We still know very little about our past, and where we actually come from. Don't take the general theories on our ancient history as fact, because as it stands it certainly doesn't look to be very clear cut at all. In the end the choice is left up to you, choose to blindly believe every little bit of history spouted to us, or Question Everything. Take a moment to look up alternatives to "established theory", and to remember in virtually all of the cases they are just that - Theories.