Devils Tower is a relic of the past, when the molten rock of the earth's core forced its way to the surface to form the throat of a volcano.

魔鬼塔是过去的遗迹，当时地核的熔岩涌向地表，形成了火山的咽喉。

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Dr Fauve's model of the Earth's core was a cylindrical tank some 50cm long filled with liquid sodium.

Fauve博士的地心模型是一个50厘米长的圆柱形容器，里面装有液态钠。

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In fact, the Earth's core is packed with enough precious metals to cover the entire planet four meters deep.

实际上，地心所富含的贵金属足够将整个地球表面覆盖上四米的厚度。

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The Earth's core is important because it generates the planet's electromagnetic field - which seems to be weakening.

BBC: Planet Earth

Specifically, what the scientists have found is that the iron adopts a crystalline structure, like a diamond, in the Earth's core.

BBC: Planet Earth

So clear are the steaming pools that to stare down into them is like staring down into a cave that leads to the earth's core.

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