Now some scientists believe that the wobbling may also be responsible for mass extinctions. It may be true or it may not be true; but it is certainly interesting. I have heard other theories with space-caused extinctions. My astronomy teacher from way long ago once pointed out how there seems to be a mass extinction each time the solar systems enters another arm of the Milky Way.
Some environmental geographers like to view the earth as an independent, island-like system. However, even the most remote islands are susceptible to storms and waves.