来自MSN22 天
Why the poles move around, and what it means to us
North is north, right? Well, yes and no. There is more than one north pole (and for that matter more than one south pole). As ...
ScienceAlert on MSN14 天
The Magnetic North Pole Has Officially Changed Position
It's time to recalibrate the navigation systems on ships, airplanes, and (given the time of year) Santa's sleigh: the ...