How do the artistic styles of vintage comic covers differ between the Golden, Silver, and Bronze Ages?

The Golden Age (late 30s-50s) featured pulp-inspired art, often with dynamic but somewhat crude anatomy and storytelling. The Silver Age (50s-70s) saw a shift towards cleaner lines, more detailed backgrounds, and a focus on science fiction themes. Artists like Jack Kirby heavily influenced this era. The Bronze Age (70s-80s) introduced more realistic art styles, darker themes, and experimentation with layouts, reflecting societal changes and a growing maturity in the medium.