Like DA FLUD!<quoted text>
So you deny that something which happened in the past would leave no trace, no evidence, of its happening that could be looked at today?
Do we have no clue of what happened at a crime scene just because nobody here now witnessed it directly (or is not saying). You don't think murder weapons, fingerprints, evidence of break-in, etc etc, would give us a clue?
We can tell a lot about the past by looking at the clues it left behind.