Great engineers, from juniors to seniors, share the trait of being endlessly curious.Curiosity differentiates engineers by driving them to understand why and how things work, rather than just settling for surface-level knowledge.Following curiosity leads engineers to learn beyond conventional roadmaps, uncovering undocumented features and deepening their understanding.Curiosity can be trained by consistently questioning and exploring deeper into technical concepts, enhancing an engineer's problem-solving abilities.