The fourth Captain America movie, Captain America: Brave New World, is finally out and has been met with middling critical reviews. Despite that, fans are already dissecting every new character and plot development that's transpired as they eagerly await The Fantastic Four: First Steps and Thunderbolts. Most intriguing is the introduction of adamantium in this movie, which is fascinating because of how it differs from the comic book lore.
Adamantium is part of the comic book-y, 'fun first' science found in the long-running universe. From vibranium to recurring alien threats, the vast Marvel Cinematic Universe takes many elements from Marvel's take on outer space. That said, the metal that covers Wolverine's skeleton had an entirely different origin in the comic books and the X-Men movies.
