Yes, the magnetosphere is weakening. It does that from time to time.
A new study makes a compelling case for the origin of unexplained masses of underground rock causing changes to the Earth's magnetic field.
An intriguing theory explains animals' magnetic sense.
Do you have a magnetic compass in your head?
It's a record magnetic field, but... yeah. That didn't last long.
New research on Uranus' magnetosphere could help scientists learn about distant systems, and refine the ways they search for alien life.