In article ,
"Tony" wrote:

I believe this theory. How else could the core stay so hot after millions of
years without an internal reaction?

By the decay of radioactive elements in the core. All current theories
are one form or another of this; no chain-reaction fission is involved.
It turns out that one doesn't need much radioactive decay to account for
the net power flow. This will be the big problem for the
core-is-a-reactor theories, to prove (without peeking) that the power
comes from fission versus decay.

joe Gwinn


Tony
"William Wixon" wrote in message
...


"new" theory there's a natural atomic reactor at the center of the
nickel-iron core.

http://nuclearplanet.com/
http://sfgate.com/cgi-bin/article.cg...GPIA17BL45.DTL