This article was originally published on Nov. 18, 2014.
From the Northern Lights, to the magnetic impact the North Pole has on a compass, this region has always fascinated human kind. Many explorers have ventured to the North Pole, some even by dog sled. Here's what you should know about the North Pole.
1. There are four North Poles. The terrestrial North Pole is a fixed geographic point that’s diametrically opposed to the terrestrial South Pole on our planet’s axis of rotation; it’s the top of the spinning top that’s Earth.
2. The North Dip Pole is the spot where the geomagnetic field is perpendicular to the Earth’s surface, “dipping” to meet the big, rotating ellipsoid that is our planet.
3. The North Dip Pole isn’t stationary. Just in the last century, it has migrated northward from a point in Canada at about 71 degrees latitude to its current position, ...
