The history of the Great Blue Hole in the Caribbean is being revealed by a 30-meter (98-foot) sediment core taken from the ...

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

For most organisms on Earth, rocks are objects, not food. But for one oddball microbe, desert limestone seems to have been on ...

Limestone, made from calcium carbonate, takes millions of years to form. These sedimentary rocks are born from the decay and fossilization of marine organisms — think coral and clams.

A shallow sea advances and retreats several times during this period, leaving behind the layers named Kaibab Limestone, Toroweap Formation, and Hermit Shale. The Coconino Sandstone layer was ...

NPCA shares the latest archaeological discovery at Mammoth Cave National Park, which has a pretty fascinating human history, too.

The discovery has sparked interest among scientists studying endolithic microorganisms, unknown life forms inside rocks.

In the desert areas of Namibia, Oman, and Saudi Arabia, research work has revealed unusual structures that are probably due to the activity of an unknown microbiological life form. Unusually small ...

In the vast and arid landscapes of Namibia, Oman, and Saudi Arabia, a team of researchers has identified a series of peculiar ...

"We don't currently know whether this is a life form that has become extinct or ... field work in Oman and in Saudi Arabia—in Oman in limestone, while in the Saudi Arabian desert they were ...

"We don't currently know whether this is a life form that has become extinct or ... field work in Oman and in Saudi Arabia – in Oman in limestone, while in the Saudi Arabian desert they were ...