Final answer:
Stephen's bravery in exploring Mammoth Cave demonstrates the courage required to face physical dangers and the risk of social ostracism. The drive to discover and understand, and the value of accurate historical knowledge, likely motivated his explorations.
Step-by-step explanation:
Stephen had to be brave to make his discoveries in Mammoth Cave because exploring such spaces requires physical courage and determination. Venturing into uncharted territories of a cave involves crawling through narrow passages, contending with darkness, and facing the unknown risks present in such environments. The risk of becoming a social outcast is also a form of bravery, as it often accompanies pioneering discoveries that challenge existing beliefs or social norms.
Stephen likely took these risks not only for personal curiosity but also due to the inherent human drive to explore and understand our world. This quest for knowledge can push individuals to go beyond comfort zones and endure challenges. Possessing an accurate knowledge of history is critical, as it forms the basis of understanding and learning from our past, which itself can inspire bravery.
Having the courage to be an outcast and thinking outside of the box are crucial attributes for making groundbreaking discoveries. These qualities allow individuals to pursue truths that may not yet be recognized by the majority or to reinterpret historical events in ways that can enlighten current understandings.