Your navigation system just got a critical update, one that happens periodically because Earth’s magnetic north pole keeps moving. Here’s what to know.
Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.
Polar days and polar nights occur in locations within the Arctic and Antarctic Circles. A polar day is when the sun does not set and stays above the horizon for an extended period, while a polar night ...