Thunderbolts Forum v3.0

It is believed that the Earth's rotation is due to the inertia that began to rotate after receiving a shock a long time ago. However, over the past half century, the Earth's rotation speed has been gradually increasing. There is a driving force behind the Earth's rotation.

https://note-com.translate.goog/ja7tdo/ ... _hist=true

Here is a thread from TB Forum v2.0 (note that some of the posted links are dead):
Why Planets Spin