Anyone who has ever stood on the Prime Meridian line at the Royal Observatory at Greenwich in London holding a compass will know that True North and Magnetic North do not align.
Earth’s wandering magnetism means that the magnetic North Pole is constantly shifting, sending metal compass needles darting away from the geographical North Pole — a problem that requires hikers to make continual adjustments when navigating by map.
But next month, for the first time 360 years, True North and Magnetic North will line up.
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