Stan Lee · every age
What was Stan Lee doing at 39?
Editor at 18, invented the Marvel universe at 38
- May 1962
The Incredible Hulk #1
With Kirby again.
Source: en.wikipedia.org - Aug 1962
Spider-Man debuts in Amazing Fantasy #15
With Steve Ditko. Marvel's most successful character.
Source: en.wikipedia.org
Others at 39
Portrait: Photo: Gage Skidmore (2014), CC BY-SA 3.0, via Wikimedia Commons · source