When Captain America throws his mighty shield.... well, he's not throwing his shield yet, but he's already got a 9 year old sidekick who sleeps in bed with him? Yes, this is just one of the revelations coming out of Captain America Comics #1, where Joe Simon and Jack Kirby introduce the Star-Spangled Avenger and his nemesis The Red Skull. 

And there are backup stories, and get this - they're first appearances of major Marvel mythological concepts as well! Pretty impressive for 1941.

Next week: Detective Comics #38, the first appearance of Robin, the Boy Wonder!