Years after it was first referenced in the Marvel Cinematic Universe, Wakanda -- the resource-rich and tech-savvy African nation led by the King T'Challa -- finally came to the big screen in last week's Black Panther, and moviegoers got a sense for what the country's deal is. In the film, thousands of years ago, an asteroid made entirely of vibranium landed in what would later become the nation of Wakanda.