I record a lot of shows off The Science Channel. It's backup for when there's nothing on TV. Lately, I watched What the Ancients Knew.
There was a lot of stuff that happened before history. That is, history is what was recorded, so before they could record, we have pre-history. Writing was a huge invention.
But that got me thinking...
What if the ancients did have some way of writing/recording stuff, but at some point they destroyed it all? What if they decided to hide something from us future humans and the only way to do that was to get rid of all trace of their accomplishments?