Researchers find oldest undisputed evidence of Earth's magnetic field - Phys.org
- Researchers find oldest undisputed evidence of Earth's magnetic field Phys.org
- Ancient rocks hold proof of Earth's magnetic field. Here's why that's puzzling Space.com
- Earth's magnetic field formed before the planet's core, study suggests Livescience.com
- Scientists uncover 3.7-billion-year-old record of Earth's magnetic field Interesting Engineering
- Geologists discover rocks with the oldest evidence yet of Earth's magnetic field MIT News