The average Hackaday reader likely knows, at least in the academic sense, what a magnetic field looks like ... produce an approximation of what the field lines would look like on its electronic ...

to create a sounded visualization of the Laschamp event. They mapped the movement of Earth's magnetic field lines during the event and created a stereo sound version which is what you can hear in ...

the angle at which magnetic field lines intersect the Earth. The turtles use these two pieces of information, which vary at every point on the planet's surface, as navigational markers that help ...