This is more of a question. I don't have a background in physics as you might notice. I am looking for a little help. Why the core spins faster than the crust? At a point the earth’s rotation was much faster, both core and out layers pretty much at the same speed. Both the moon and space itself causes drag on the surface of the earth. Once the moon comes into play, the earth’s inertia is slowed down by the moon gravitational forces along with the drag of space itself. Since the center is liquid and in itself has inertia does not mean that both the core and outer layers are affected the same. The inertia on the core remains more at a constant while the outer layers are dragged, if you will, against the moon’s forces causing the out layers to slow while the inner core is affected less . Of course, over a considerable amount of time. This would cause a different in rotation for both the solid outer and the liquid core. During the development of the earth, the outer crust begins to cool while the mantle cools, and the mantles electrons would a line in the direction of the magnetic poles. Due to the thickness of this direction line up of electrons in the crust and mantle wouldn’t the stationary crust/mantle electrons create lines of flux and the core of iron act as a conductor in a sense? After the core begins to lap the crust/mantle a difference in magnetic fields (crust/mantle and core) will begin to conduct. The core is the conductor that stores energy and releases it in both a magnetic field and heat. At this point could we consider the earth as one massive inductor? Does the core after lapping the solid outer mantle only can stored so much energy that is cannot appose/rotate anymore due to the magnetic differences and comes to a stop? The core would change its rotation direction due to the opposition of fields. A total of two shift of rotation would have to be applied given what has been researched. The opposing core rotation would only last a faction of the time versus when it rotates the same direction. Is it a possibility that our rotation and the Sun’s magnetic field play a part in the amount of energy the earth takes in and keep its core moving? Does the speed in which the planet rotation directly correlate with how much energy the planet can store? Is the reason that Venus has a greater gravitational forces is become the crust and it mantle have been slowed down so mush versus its core causing a larger difference against the opposing fields? Is the reason Mars has a less gravitational pull become it was not large enough to store enough energy to allow the core to spin and change direction? Maybe after its first cycle it didn’t have the energy for its core to jump start again when it did change directions. That would be reason for it having an atmosphere for a given duration and the reason it die out long before earth will.