Earth is surrounded by a magnetic force field, a bubble in space called the magnetosphere that is tens of thousands of miles wide. This magnetosphere acts as a shield protecting us from solar storms.
Researchers investigating one of the most powerful geomagnetic storms in recent history, have discovered that our magnetosphere has been cracked, this could leave the people of Earth vulnerable to cosmic radiation, scientists have warned.
Researchers suspect that the geomagnetic storm was powerful enough to actually 'reconfigure' our magnetic shield, prising open weak spots to let radiation and cosmic rays slip through.
The fact that this happened is a concern, because it suggests that our magnetic field is changing or rather, weakening in certain parts.