Now coming to the question "Did advanced human civilization exist for more than 5000 years?", I am compelled to believe that it has existed. Fortunately or unfortunately, for good or bad, it has become a lost chapter in human history. There are hundreds if not thousands of evidence available and new discoveries are made almost everyday in one or the other part of the world. Frankly speaking I am no academic, I may not know even the tip of the iceberg. I am interested in only reading about these things and not any serious research. Moreover, I should admit that I myself don't necessarily believe in all the things which are submitted as proof without sufficient evidence to back them up. But I will certainly say that from whatever simple proofs they have found, for a person with ordinary general knowledge and common sense, it seems highly impossible to reject these evidences. I can keep writing endlessly on this post but it will take me days together to complete it. I will present some very simple yet uncomfortable evidences. You can draw your own conclusions and as I said earlier, if you want to argue with me, you better do your homework properly to back up your evidence.
In this post I will post only a few recent marine archeological findings whereas in my next post I intend to post some other findings. Off late numerous findings have been made in marine archeology especially sunken cities. These sunken cities are found all over the globe. What I mean by "sunken cities" are the vast complexes of man-made or built structures which are now submerged under sea. I won't be going into details of when they were found or any such chronology or stories. I will just introduce them very briefly and post a few links. You can check them out.
There are many such sunken cities found today all over the planet, some controversial and seemingly mysterious and others accepted as genuine waiting further evidence gathering. One such sunken city is Yonaguni, an island off Japan, a part of the Ryuku islands chain. Massive structure of a supposed pyramid has been found underwater near this island. The step formation and the structure of the stone has become a mystery. Mainstream scientists tend to argue that it is a natural stone structure. But serious questions have been raised about the natural formation theory. Scientists have been forced to accept that though the structure may not be entirely man-made there may be significant human intervention here. Similarly a sunken city was found near the western coast of India (the Gulf of Cambay) which is the supposed mythical city of Dwaraka and a city near the south eastern coast of India near Mahabalipuram. There is also an underwater city found near Cuba.
With all these discoveries, one can only start wondering what these cities are doing under sea and how they came there? And looking at the vast complexes, one needs to start questioning if large civilizations existed before the ice age and the great deluge. Here are some of the links, take a look at them, use your own common sense and reasoning, and draw your conclusions. I will be posting some more supposed proofs which state that not only did civilizations exist before the ice age, but they were also technically advanced.
If you still want to reject it right away, then I can only say "Let them with eyes see".
http://news.nationalgeographic.com/news/2007/09/070919-sunken-city.html
http://www.cyberspaceorbit.com/phikent/japan/japan2.html
http://www.hermetics.org/cambay.html
http://news.bbc.co.uk/1/hi/world/south_asia/1768109.stm
http://www.unknowncountry.com/news/?id=2075
http://www.s8int.com/water1.html
You can also take a look at the photos here