I have, in the past, tried to explain how the Earth’s magnetic field is generated by convection in the Earth’s molten outer core. Here, in Scotland, however, it seems that they have their own ideas (sorry for the poor picture quality):
If you’ve never experienced the excessively scary orangeness of Irn Bru, Scotland’s other natural drink, then you’ve missed out on supping a heady brew that probably contains more additives than water. Perhaps, then, the magnetic field is merely a side-effect of a planetary interior stimulated into hyperactivity by all the artificial colourings.
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