In other occasions, I had heard about Kurt Busiek's fabled encyclopedic knowledge of Marvel continuity. The other day, I got to experience it first hand. The writer of titles like Avengers, Marvels, and his own Astro City must have the memory of an elephant.
I don't remember how, but I sent Busiek a message via Twitter about Spanish in comics. Earlier that day, I had read an issue of Thor were he passed over Mexico, and there were some funny scenes with the translation being screwed up. Almost instantly, he sent a reply (which is rare in of itself on creators, most of them just ignore you) and not only he knew what I was talking about, he knew specifically what issue and what scene I was referring to! Keep in mind that this was a comic that was released in 1979!
As if that wasn't impressive enough, he even remembered a specific quote from it, and he recited it verbatim. Holy shit! Later, he said he remembered the issue pretty clearly because he had read it for his research when he was writing the Avengers title... in 1998! That is more than 12 years ago, and he still remembered it clearly. I can barely remember what I read 12 minutes ago, let alone 12 months or 12 years ago.
Therefore, the only logical conclusion is that Kurt Busiek must be some kind of genius with photographic memory. Either that, or he went and looked up the issue in question while he was chatting with me. But I am leaning more on the first one.