Mysterious tunnels in desert rocks may be the work of unknown microbes, hinting at a hidden world inside marble and limestone ...
The pyramids were covered in polished white limestone that reflected the desert ... the plundering of the pyramids' cladding stones began during the reign of Pharaoh Tutankhamun, between 1336 ...
12don MSN
In the desert areas of Namibia, Oman, and Saudi Arabia, research work has revealed unusual structures that are probably due ...
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