[There are a number of weird things in this video. What is fascinating is that they now say this happens every 70 years!!!! That makes no sense at all. I originally wrote about the core of the earth being a naturally occurring nuclear reaction. A natural nuclear reaction does change direction. I used to chat to an American nuclear scientist and he explained how and why this would happen. I find the story of the core changing it's direction every 70 years crazy. That makes no sense … except if it is a naturally occurring nuclear reaction. Jan]

Here’s the video: https://www.youtube.com/watch?v=Cgr6Tuz3G-w