This core movement is why and how Earth has a magnetic field: spinning iron soup generates electrical currents that add up to an electromagnetic effect. But in recent years, the core has slowed.

A recommendation downgrade from a veteran investment bank had a predictable effect on Dollar General (NYSE: DG) stock Tuesday. Investors put the company in the bargain bin by trading it down by ...

This core movement is why and how Earth has a magnetic field: spinning iron soup generates electrical currents that add up to an electromagnetic effect. But in recent years, the core has slowed.