Did you know? Human Torch was Marvel’s first superhero, debuting in 1939.
Stan Lee’s boss rejected Spider-Man, thinking the character wouldn’t be popular.
Mjolnir, Thor's hammer, was inspired by a neutron star, the densest object in the universe.
Hulk was initially grey, but printing issues led to his iconic green appearance.
Wolverine was initially written as a villain before becoming a beloved X-Men hero.
Black Widow is much older than she looks, thanks to a serum that slows her aging process.
Tony Stark's character was inspired by Howard Hughes, a wealthy, eccentric inventor during wartime.