Quiet remains of far earlier worlds can be found on cliffs in some of southern Africa's harshest regions. Signs of changing climates and gradual geological stress are frequently preserved in marble and limestone formations, which were developed long before the deserts of today. The majority of markings align with established patterns of mineral alteration or erosion. But something that contradicts those ideas has been observed by researchers in sporadic outcrops throughout Namibia and portions of the Arabian Peninsula. Tight, parallel lines of fine, repeating tunnels pass through the stone. They carve into solid rock by extending past fractures while yet following them. They are uniformly spaced and have a regulated shape. These characteristics seem antiquated, dormant, and hard to describe. They highlight procedures that no longer function in these settings.
