Plausibility of ancient extraterrestrials

[Gawdzilla Sama]

At the Wailing Wall, vendors' section:

He: Lady! I got John the Baptist's skull, genuine article!
She: I thought his skull was in the Vatican?
He: That's his adult skull, this is his baby skull.

didn’t you know saints molt like insects and leave behind a discarded skull every time their heads grew too big for their skulls?

That great documentary, "The First Men In The Moon", covered that.