The top half would use the liquid-fuelled core-stage technology and engine that powers the Ariane 5.

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This architecture also enables NASA to leverage existing capabilities and lower development costs by using liquid hydrogen and liquid oxygen for both the core and upper stages.

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The origin of this effect may lie at the boundary between the mantle, made up of viscous rock that extends 2, 900 km (1, 800 miles) below the crust, and the outer core, which is thought to be liquid iron with the consistency of water.

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Their working model is a shoebox-sized package of electronics and liquid-filled tubes, with a silicon chip at its core.

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Now enthusiasts can achieve unmatched overclocking potential with increased reliability since the core of Digital Storm's Sub-Zero Liquid Chilled System has no moving parts.

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The Ariane's core stage, which is prepared in northern France, uses liquid hydrogen and liquid oxygen as its propellants.

BBC: New rocket could lift astronauts

The Liquid Z2, on the other hand, is an entry-level handset with a dual-core 1GHz CPU and a 3.5-inch HVGA screen.

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The heat that keeps the core of the earth molten is primarily radioactive decay -it is what makes rock into liquid lava.

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