Another topic I find fascinating is magnetic pole shifts. It's estimated that they occur every 450,000 years or so and we have no record of a pole shift occuring for over 780,000 years. There are a few theories of why these pole shifts occur and what happens to the atmosphere and the earth when they do. One leads into another theory we have about how our solar system is a binary star system and there's planetary bodies on elliptical orbits between a distant white dwarf star we call "Nemesis", and our own sun. The reason the theory came about is because astronomers couldn't explain the orbits of some of the planets in our solar system. The only way the orbits would make sense is if a large planetary body frequented our solar system on a regular basis. I won't go into any further, but here's an article I found if anyone wants an interesting read: https://www.google.com/amp/s/www.space.com/amp/22538-nemesis-star.html This would enter the catagory of cataclysmic climate change theory. Food for thought.