It would certainly help explain why Earth is a big size for a rock planet.
What makes the earths inner core rotate at a different speed? (creating our manetic field)
I am beginning to think the curst being hit by a large asteroid may send the outer shell springing back and forth against the spongy interior, like the way a screen door will swing back and forth slowly, until it fades...
That would explain pole shifts AND mass extinctions.
At the top of each swing (before it swithces dierection) there is briefly no magnetic field- which is not good at all for life in earth.
Then it swings the opposite direction for a while, going back and forth every 28,000 years or so?
Given the earth is spinning in a frictionless space, the change in speed from the inner core and outer crust has always confused me.
Maybe we are the rocky remains of a gas giant that had its atmosphere burnt away by some solar event.