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

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

In places where there are lots of joints and bedding planes together, the cracks can start to form a cave. ISLA: All these cracks in the limestone explain why the caves get here and why they are ...

Limestone, made from calcium carbonate, takes millions of years to form. These sedimentary rocks are born from the decay and ...

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

"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 ...

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"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 ...

Subsequent investigations in Oman and Saudi Arabia revealed similar structures in different types of rock: limestone in the case of Oman and marble in Saudi Arabia. This pattern of distribution ...