The Marvel Universe is a fictional shared universe where the stories in most American comic book titles and other media published by Marvel Comics take place. Superhero teams such as the Avengers, the X-Men, the Fantastic Four, the Guardians of the Galaxy, and many Marvel superheroes live in this universe, including characters such as Spider-Man, Wolverine, Iron Man, Captain America, and Thor. It also contains well-known supervillains such as Doctor Doom, Magneto, Green Goblin, Ultron, and Thanos. It also contains antiheroes such as Deadpool, Ghost Rider, Punisher, Elektra, and Black Cat.