Let’s face it, there was a super-advanced ancient society that existed on Earth long before us. From a less hazy perspective, we can fairly say that it’s ludicrous to imagine that there was never another civilization like ours out there in the billions of years that supposedly preceded us.
Consider this: we currently own this planet, but what would be left of us in a million years or so if we were to expire completely?
We could find some structures that have lasted the test of time, but that would be all. It’s the same situation right now with these small trinkets that we come across every now and then and which date back millions of years.
The evidence is all around us; it’s there in front of our eyes, but we’re too blind to perceive it for what it is. The trouble is that contemporary historians have carved their claws so deeply into our necks that we can’t conceive of anything but what they say. Consider your options, think logically, and come up with your own theory.