Love them or hate them, Crocs have become a modern-day shoe staple. Slip them on to run out to the garden, or slide your foot in while running out the door for school drop off, and you're good to go.

While the Marvel Cinematic Universe features many classic Avengers foes, some of Marvel's best villains remain absent.

Discover five fascinating facts about how some of the most iconic comic book characters came to be, following their creation origins.