The needle of a compass has guided humanity for centuries, pointing unerringly toward the magnetic north. But what happens when that point moves — and accelerates? This week, scientists unveiled ...

The needle will turn and then come to a complete stop. It will be facing magnetic north. You can check this by placing the compass next to the bowl. The needle is being affected by the Earth’s ...

Iron is magnetic so the liquid iron causes Earth to have a magnetic field. The needle of a compass is a small magnet that can turn. It turns around until its own magnetic field lines up with the ...