A force-directed graph displays Marvel superheroes and their connections, rendered as an interactive network of images. Clicking a node reveals the character's name and a link to their course certificate. The visualization uses `d3.layout.force` for physics simulation and `d3.layout.tree` to derive links, with SVG elements like circles, images, and text for display. Nodes scale by a `size` attribute, and hover animations enlarge images via D3 transitions. Data is fetched as JSON from a remote GitHub URL.