What is one interesting fact about Marvel Comics?

Unlike many of the superheros of their time, Marvel's first big super-group (Fantastic 4) refused to use secret identities or even costumes at first. wolverine was a mutant with the power of healing and three retractable bone spikes. he was then chosen for the 'weapon x' program which involved them coating his bones with adamantium. he was chosen for this because normal humans would not survive the process.