Ancient Microbial Traces Discovered in Desert Marble and Limestone

Researchers from the University of Mainz uncover mysterious tubular structures likely formed by unknown microorganisms 1-2 million years ago.

Scientists identified parallel tubular structures in marble and limestone from Namibia, Oman, and Saudi Arabia, forming bands up to 10 meters long.
The structures, measuring about half a millimeter wide and up to three centimeters long, are believed to be 1-2 million years old.
Researchers suggest the tubes may have been created by microorganisms tunneling into calcium carbonate for nutrients.
The origin of the microorganisms remains unknown, and it is unclear whether they are extinct or still exist today.
The findings, published in the 'Geomicrobiology Journal,' provide insights into ancient life and its interaction with Earth's geological history.