Bar magnets and horseshoe magnets are two of 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 ...

This map and an internal magnetic ‘compass’ rely on distinct mechanisms, implying that turtles have two magnetic senses. We developed a magnetic-coil system that could replicate the magnetic ...

Since ancient times, the sun has been known as a giver of light and heat, a source of life. Plants are coaxed from the Earth by its rays, bringing spring, followed by bountiful harvests.