The core is hardening, and the poles magnetic field is also weakening. When it fails, and it will fail, it could signal the start of a pole polarity shift. Best guess has been that the magnetic field of the Earth will "off line" any where from six months to hundres if not thousands of years. So if the poles do flip, and they are on the virge of doing so, then we have a serious problem.
Any one have sun block 10B as in Billion?
I think it might be a good idea to invest a lot more time and money into determining what the effects of a complete or near complete magnetic field break down will be.
Oh by the way, the have proven that some of the rings of Saturan are pure frozen h20.
