comments:
Doorknob6941 posted on r/conspiracy6d
I've read a couple of books about polar shifts and none mentioned aliens but it's a convincing theory explaining why we had an ice age. One book is called "5/5/2000: Ice, the Ultimate Disaster. This one predicted the earth would tilt off it's axis on 5/5/2000. Didn't happen, obviously, but still an interesting read. https://www.amazon.com/2000-Ice-Ultimate-Disaster-Revised/dp/0609800671