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kennyc · 10-03-2010, 05:24 AM

Scientific American article on the same topic:

http://www.scientificamerican.com/ar...B7809EC588F2D7

There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements. ....

10-03-2010, 05:24 AM	#15
kennyc The Dank Side of the Moon Posts: 35,920 Karma: 119747553 Join Date: Sep 2009 Location: Denver, CO Device: Kindle2 & PW, Onyx Boox Go6	Scientific American article on the same topic: http://www.scientificamerican.com/ar...B7809EC588F2D7 There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements. ....