Ancient magnetic mystery: Was Earth's shield really stable 450 million years ago?

Researchers are challenging a decades-old assumption about Earth's magnetic field during the Ordovician period, questioning whether a long stable phase actually occurred. The findings could reshape how scientists understand planetary magnetism and its role in protecting life—with implications for modeling past climate and assessing planetary habitability.

Originaltitel: Ordovician Reversed Superchron: Fact or Fallacy?