How to reactivate Earth's own electromagnetic field ?

[JMB]

My title look damn crazy ?... Not so much I believe.
As far as NASA futuristic "terraforming" scenarios for Planet Mars are concerned,
it is said that the planet's own electromagnetic field will need to be (re)activated in order to protect life (even bacterias) against cosmic rays and solar winds.
This will be absolutely mandatory before life could (re)invest the Red Planet !

How would this reactivation be possible ?

And before Planet Mars... what about Planet Earth (where we live for sure) ?
We are told by Marvin Herndon, a Canadian Scientist, that the Earth's Core is
a nuclear reactor going slowly... but surely ASLEEP.
That mean : a full stop of Earths electromagnetic field. Not "just" an inversion,
but a FULL STOP = dead of life !
This could even happen within the next 100 years in the worst scenario !

My main question is :
before even thinking about reactivating Mars electromagnetic field
wouldn't it be wise to think first how to avoid our Earth loosing its own field ?
Subsidiary question :
Has the scenario of the film THE CORE some consistancy about ways to "reignite" this dying nuclear reactor at the centre of the earth ?
JMB :bondage:

[Protostar]

How about instead of re activiating the damn thing, SAVING IT.
Its not completely gone ya know. But we may have passed over that threashold.
and, our core is dying? never heard of that one. going to sleep? eh?
a full stop wouldn't work. although there are 2 planets in our solar system that spin backwards there is not explaination as to why. maybe they were at a stop and then reversed.

[JMB]

Protostar,
Type "Dr Marvin Herndon" on the net and you'll find this theory explained from this Canadian geophysist for about 10 years by now.
JMB :headbang:

[stewey]

Even IF the core does indeed end up solidifying, it will not happen for another 2 billion years. We got a while :2thumbs:

http://www.exitmundi.nl/core.htm
EDIT: "The Core" is incredibly inaccurate, scientifically wise.

[stringybeef]

please explain stewey : ) sounds interesting

[stewey]

Check http://www.exitmundi.nl/core.htm

Has some good information. Real interesting site.

[liberdave]

Even IF the core does indeed end up solidifying, it will not happen for another 2 billion years. We got a while :2thumbs:
http://www.exitmundi.nl/core.htm
EDIT: "The Core" is incredibly inaccurate, scientifically wise.
First off, that site started off by saying that the Moon had a molten core once upon a time. That's horseshit. The moon never had a molten core. Second of all, gravity. Gravity is what keeps pressures so high down there, so we would have to lose a whole bunch of mass before our core froze. And they are implying that the Earth will lose heat by transferance or conduction. That's horseshit as well. And Im sorry, but the earth's core has way to much velocity and mass to just freeze up.

[Mezurashi]

First off, that site started off by saying that the Moon had a molten core once upon a time. That's horseshit. The moon never had a molten core. Second of all, gravity. Gravity is what keeps pressures so high down there, so we would have to lose a whole bunch of mass before our core froze. And they are implying that the Earth will lose heat by transferance or conduction. That's horseshit as well. And Im sorry, but the earth's core has way to much velocity and mass to just freeze up.

actually, the current theory is that the moon as we know it coalesced out of ejecta from some long ago stupendous impact on the Earth. so it could be argued that the Moon had a molten core right there at the beginning. but whatever it is that keeps Earth's core hot and runny didn't happen with the Moon, most likely insufficient mass but there are some 'anomalies' being found in other parts of the solar system.

And I'd like to toss in an old Sci-Fi idea from author David Brin that the Core might be home to a quantum black hole that was dropped in there by an unknown alien species (presumably to get rid of us). He tries to connect the 'drop' with the Tunguska incident, make a nice neat package out of it.

However I would not be disappointed if we discovered the lost home of the Eloi, some abandoned Mithril mines and a Neanderthal colony or two...

[Sammy56]

Well, there are some out there who do seem to think at least part of the moons interior is molten.

http://archives.cnn.com/2002/TECH/space/02/15/moon.beam/

And some out there who seem to think that the core has cooled at least partially.

http://www.psrd.hawaii.edu/Sept99/MoonCore.html
(Slightly more then halfway down the page under MAGNETIC HISTORY.

It seems as though the scientific world is still undecided on the statues of the Moon's core. We do know that the Moon has a magnetic field and that one cause of magnetic fields is a spinning molten core, but there are also other ways. Mars and Venus both have at least partial magnetic fields, while neither of them have a molten core.