M_a_r_c wrote:

> news: 4738267c@news.povray.org...
>> I believe that the current theory is that the heat is partially a leftover
>> from the planet's formation, and partially from the natural decay or
>> radioactive elements.
>>
>> I may be wrong. Geology isn't my forte.
>>
> That's the theory I read in some papers as well.
> They say that if there was no radio-activity, the core and the mantle  shoud 
> be solid and no more magnetic field and no more protection from Van Hallen 
> belt thus no more life on Earth
> 
> Marc 
> 
> 
While protection from Van Hallen sounds like a good idea, it is the Van 
Allen radiation belt that you might be referring to :)

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