In the desert areas of Namibia, Oman, and Saudi Arabia, research work has revealed unusual structures that are probably due ...

Scientists recently identified peculiar micro-burrows in marble and limestone formations in Namibia, Oman, and Saudi Arabia, ...

Mysterious tunnels in desert rocks may be the work of unknown microbes, hinting at a hidden world inside marble and limestone ...

It is assumed that microorganisms may have bored the tunnels to use nutrients present in the calcium carbonate, the main component of marble. The fine powder remained behind. Passchier also found ...

Strange, tiny structures have been found in the rocks around the deserts of southern Africa and the Arabian Peninsula.