<I think you've answered your own question, Graham. There IS no incontrovertible evidence.
To be fair Carol , Graham is asking the question for the Best evidence,
I quote "what in your view are your best pieces of evidence in support of the ancient alien hypothesis? Ideally I would like to see evidence that would be really hard or impossible to explain by any other hypothesis.
Incontrovertible are your words Carol, that ask for 100 % proof, Graham is just asking for the Best evidence in Support of the hypothesis of Alien intervention.
Evidence can come in many forms, people have been executed for far less than Incontrovertible evidence.
Of late i am of the opinion that there would be more chance that the visitors in our past, were from the future, or an alternate reality that may exist along side out own but separated by a dimensional curtain of sorts.
One only has to project our own time frame into the future , say another 1000 years, and what seems unlikely now will be easy as pie, its just a matter of time.
But as for any evidence, well for now we have to settle for clues, and hints of their fingerprints on our past.
For me the best evidence i feel that has come down to us from the past in the Old Testament stories, a lot of it set in the time of our old ancient Egyptian friends.
So who thinks these stories are just made up, is it all an invention.
Go read Chapter 18 in Genesis.
God comes and visits Abraham with three other guys, and Abraham wants to wash Gods feet, ok so God has feet then, well that good to here that he/she is one of us, hang on , one of us, no that cant be right, can it ?,
He also goes to get him something to eat, well thats good to hear that God has a digestive system,
God then asks Abraham , where's your misses Abe, oh she's in the tent next door.
So God then tells Abe im going to give your misses a son, which surprised Abe as they were well old.
Now Sarah heard this and laughed to herself, then God aske Abe , why is she laughing , she then said no i didnt laugh, God said oh yes you did,
One gets the feeling the other three guys would have told God to leave it guv shes not worth it.
And then shortly after this event Sodom gets Nuked .
So who really are these visitors to wield so much influence and power over the locals of that time,
Another smoking gun for a visitation is the Ezekiel story, its obvious to anybody nowdays that something awesome is about to land.
So thats my kind of evidence that alludes , and for now alluding is all we have.
Post Edited (31-Mar-14 16:32)
G1 x G2 x G3 / 12 / 5280 / 1.73206803 = 186,282,398