When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right ... and generators to operate. In the Earth (see image below right), the ...

This dynamic movement generates Earth's magnetic field, a protective shield against harmful solar radiation and cosmic particles. This magnetic field also influences plate tectonics and mantle ...

The outer core is liquid iron and nickel and generates the Earth's magnetic field. And the inner core ... made from solid iron and nickel. In this diagram, the red lines represent the edges ...

This "nano-compass" allows the microbe to passively orient itself in Earth's geomagnetic field (Figure 2). These magnetic nanoparticles ... concentration (top of the diagram) swim forward to ...