"Fantastic Four #1," published in 1961, marks the debut of the superhero team known as the Fantastic Four. Created by writer Stan Lee and artist Jack Kirby, the comic introduces four characters: Mr. Fantastic, Invisible Woman, Human Torch, and The Thing. They gain superpowers after being exposed to cosmic rays during a space mission. In this issue, the team faces their first challenge against the villain Namor the Sub-Mariner. The story sets the stage for their adventures, showcasing their unique abilities and the dynamics of their relationships. This comic is significant for launching the Marvel Universe and redefining superhero storytelling.