Can anyone explain to me/offer theories about the magnetic fields of Venus and Mercury?

Well there are alot of theories about why this occurs, however until we actually send some probes there to test the theories and find the right one, we are basically just making guesses. But probably the fact that Venus has a very slow rotational period which does not produce the dynamo effect is the reason. More about the magnetic field of Venus is here

http://www-spc.igpp.ucla.edu/personnel/russell/pap...

Mercury probably still has a bit of a molten core

http://www-spc.igpp.ucla.edu/personnel/russell/pap...

Basically the theories don't explain everything we observe,

Does this mean the theories or science are wrong? No, it just probably means we are not taking everything into account. And that we have missed something. This is what makes science so interesting. We find discrepancies and we have to discover the reason. So we think about it, come up with new or modified theories, and then design tests to determine which are correct. This is what science is all about. Here is another website I found that explains a bit about it, enjoy.

http://www.astronomynotes.com/solarsys/s7.htm

magnetic fields either come from a current on electrical charges (an electromagnet) or from locked in magnetic diploes (like a permanent bar magnet). The solid mass of mercury either has a lot of magnetic material that is lined up so the poles are mostly in the same direction, or the planet contains some net charge, and by spinning on its axis, its essentially creating a current, and therefore, an electromagnet.

a liquid is less likely to have a frozen in magnetic field from lined up poles since the poles are free as liquids. also, few liquids are ferromagnetic, though some metals that are normally solid may be liquid on venus. if it does not carry a net charge in its mass or on its surface, it would not create a magnetic field. the earh magnetic field is problby caused by its molten core spinning and creating a current. without the current, there ywould be no magnetic feild

mercury may be the most iron rich planet but it does not rotate fast enough to create a magnetic field. venus also has an iron core but again the rotation is too slow to create a magnetic field.

I guess my question would be, how can you quote biblical scripture as truth, and in the same statement say that the bible was not meant to be taken literally. And who gets to decide the literal, and the not? Seems pretty hokey to me.