Ancient Secrets

Step back and consider the following.
We are not alone. We have never been alone.
There are billions of other earth-like planets.
There are millions of intelligent civilizations living on these planets.
Thousands of these civilizations communicate with each other.
Hundreds of these civilizations trade with each other.
Several have visited earth.
Our ancestors have documented meetings with some of the visitors.
One visit helped ancient Atlantians build a great civilization.
One visit resulted in some...