언더랜드: 심원의 시간 여행

His fascination with hidden landscapes and deep history really comes through. I'm curious what sparked his desire to explore these underground realms and connect them to our modern world.

The book made me think about how fleeting human life is compared to Earth's deep history. It’s a humbling experience — did others feel similarly amazed or small?

The prose is so evocative, yet grounded in research. I wonder how he decides what to include from scientific sources and what to leave more lyrical.