Bernstein was a writer that I was a fan of as a child even though I didn't know his name. The barbershop where I started reading comics had a massive collection of old DCs, mostly the Superman titles. Many of the short stories were by Bernstein including this 1961 Swan-drawn one.
"I guessed that Loki must be the original ancestor of Mr. Mxyzptlk and that he, too, can be sent to the 5th dimension for 90 days if he could be tricked into saying his name backwards." JIMMY OLSEN #55 (Jimmy the Red, Thor's Best Pal)
Page eleven from MARVEL'S GREATEST COMICS #57 was created by combining pages twelve and thirteen of FANTASTIC FOUR #75. Originally these five panels took up one and a third pages but a crafty cropping job made the average 1975 Fantastic Four fan blissfully unaware.
I remember reading an explanation by Stan Lee on why he decided to create a
shared universe with characters that aged and evolved. It was because, based on
the Golden Age superhero era, he assumed that superheroes would only last 8 or 9
Both series start with the same basic premise: a crash landing causes four
characters to become action heroes. Instead of starting with a synopsis splash the more than a dozen Kirby CHALLENGERS began with a symbolic
splash. The synopsis splash evolved through necessity when Lee created the
stylized reality known as the Marvel Universe by combining action heroes with
the soap opera format.