Time is cruel towards everyone, even Marvel superheroes, as you can notice in our fanart Old Hulk Sticker. Even though Hulk is a green-skinned, hulking, and muscular humanoid creature with limitless physical strength, he is still a human named Dr. Robert Bruce Banner, who is a physically weak, socially withdrawn, and emotionally reserved physicist. Even though Hulk got older, Loki is still afraid of him after New York.