It's that you need to go to a place that's a desert today, a place that doesn't have too many plants covering up the rocks, and a place where erosion is always exposing new bones at the surface.
다만 오늘날 사막인 곳에 가셔야 암석을 뒤덮고 있는 식물들이 많지 않고 침식이 항상 표면에 새로운 뼈를 드러내기 때문입니다.