Perhaps not the most discussion-inspiring thread, but I have some questions and thought a catch-all "reference" thread of sorts might get me some answers. Also thought others might like to add questions.

I recall an issue, probably bronze age, where Ollie is about to fall to his death. He uses an arrow to get Hal's ring back to and Hal in turn saves him. Anyone remember which issue this is?

In post-COIE, when did Dinah learn identities of Batman, Nightwing, etc.? Did she learn at all? I know there were Dixon-era issues where she did not know, but don't know if she ever knew before or after that.

Besides each other, who were the first heroes to learn Batman and Superman's secret identities in actual stories about that? I recall the story where the Justice League all got swapped up memories and revealed them all to each other in retcon, but I'm excluding that one. Wouldn't mind first post-COIE incident, either.

When was Superman's first non-earth-based adventure? If it was Superboy or Krypton, what was the first that wasn't either of those?