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Originally posted by Chovy
it's funny science also says the core is so thick they don't know what's down there but science also says it's a "magnetic core". I don't buy it.
Movement in a conducting liquid generates electricity and magnetism, and the accepted theory has been that it's the swirling molten metal at the Earth's core that is responsible. But according to research from Northwestern University it's actually seawater - which is conductive because of the dissolved salt - that produces the effect.
The average density of Earth is 5,515 kg/m3. Since the average density of surface material is only around 3000 kg/m3, we must conclude that denser materials exist within Earth's core.
pretty sure some russians did that in the 80s.
Originally posted by mpriebe81
I really have no idea whether or not I buy the currently accepted theory.
There are too many unknowns.
Have we ever attempted to drill down as far as we could go to see what's
down there? That would be interesting, stick some cameras on a giant drill
and snoop around a bit.
I'm going to go watch Journey to the Center of the Earth now.
Originally posted by careface
apparently towards the end of the project they started hearing human screams and moans so they stopped
The deepest hole drilled to date is the SG-3 borehole which is 12.3 km (7.6 miles) deep, part of the Kola Superdeep Borehole project, and thus visual knowledge of the Earth's structure extends that far.