柯博拉：那不是地理北极或者物理北极。
地球也是一个大磁体，它的两个极分别在接近地理南极和地理北极的地方。
The Earth is also a big magnet, and its two very near the geographic South Pole, respectively, and the geographical North Pole areas.
这一速度太快了而同样无法用真极移现象解释，真极移理论认为地球的整个地壳和地幔都在不断调整，将一个完全不同的地理区域移到了北极。
That speed is also too fast to be explained by a phenomenon called true polar wander, in which the Earth's entire crust and mantle reorient, moving a different geographic region to the North Pole.
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