So last night I’m watching live TV (which we never do, or hardly ever do) and there’s a tv show from 2008 about the swapping of the poles. Yes, the poles are swapping. It’ll take 40,000 years, maybe less ’cause we’re all in such a hurry these days. So the partial collapse of the magnetosphere is connected to the weakening of the magnetic field of the earth, and it’s borne out by looking at ships’ logs from the 1590’s on. Up until 1840 or thereabouts the field strength was about the same – it’s been dropping steadily ever since. For more details, most of which are incomprehensible but at least the article links are understandable, check out Wikipedia for Magnetosphere, South Atlantic Anomaly and Earth’s Magnetic Field.
mOm is always telling me about relatives and my relation to them, and here’s a handy map. With level of genetic kinship.