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New Curtin University research has revealed that the Ninetyeast Ridge -- the Earth's longest straight underwater mountain chain -- formed through a different process than previously believed.

For 4,500 years, the pyramids of Giza have loomed over the western bank of the Nile River as a geometric mountain chain.

The country straddles two tectonic plates, which are divided by an undersea mountain chain that oozes molten hot rock, or magma.

The two priests worked at the church in the small town in the Sierra Tarahumara mountain chain, home to the Raramuri indigenous group and the site of increasing cartel violence.

Especially worrying is the outlook for the Sierra Nevada, the long mountain chain that runs through the eastern part of the state.