That is right.  I believe that there were ancient civilizations here on Earth.  I believe in God and the Bible and I am not sure if I believe in alien life, though I believe it is possible as well.  What I do know, is that even civilizations 5,000 years ago are for the most part unknown to us, buried under oceans or thousands of feet of dirt and stone.  Recently, scientists discovered that Antarctica once thrived with palm trees.  Click here if you don’t think so – http://www.bbc.co.uk/news/science-environment-19077439  The Sahara Desert was once extremely fertile land.  We have evidence now that the Ancient Egyptians came from the west when the climate changed, then settled around the Nile.  The North Pole, or Arctic Circle was also once sub-tropical, with temperatures of 20 degrees C, or 68 degrees Farenheit, you can click here – http://news.bbc.co.uk/2/hi/science/nature/3631764.stm

Cultures throughout the world have unexplained drawings of strange beasts, flying machines, giants and other creatures using advanced technology.  The rumors of Atlantis and other lost civilizations have long been known.  Scientists once thought that Troy and the whole Trojan War was fiction.  Now they know it was based on fact, they even know where Troy is and are digging it.  Another explorer found two cities that were suddenly destroyed by fire exactly where he expected Sodom and Gomorrah to be based on the Bible.  He even found the caves and the salt bed mentioned.  Recent discoveries show that even before the first dynasty in Egypt, there were large cities previously unknown, with breweries and crafted buildings standing over fifty feet in height.  They now refer to it as the zero dynasty, where the famed “Scorpion King” once was.

When Robert E. Howard wrote the Conan series, he based it on a real previous world, where England was still connected to Europe and so was Africa.  We now know there WERE people living at that time, and they had advanced fishing tools and other implements.  We find ruined cities off the coast of western Europe.  Tolkien also wrote of Middle Earth as being a distant past of our own Earth.  I know the concept is strange.  If you watch the show Ancient Aliens, you have the guy with the strange hair telling you they were aliens.  I am not so sure.  I actually think several times the Earth has been populated, then destroyed, and fragments remained to rebuild.

Here is more proof of my theory: you can see the original here – http://www.stumbleupon.com/su/56evHr/:1z1WnwlqG:Q!yB6hoF/www.d.umn.edu/cla/faculty/troufs/anth1602/images/writing_French_caves.jpg/

If you go to the site it is much easier to see, but it shows the same symbols being used in cave drawing all across the current Earth.  All before recorded history.  When Earth was Pangaea, who lived here?  When the continents and climate changed, who lived here?  I think if we knew those answers, we would all have our view of ourselves turned upside down.