- Earth's magnetic field is much older than previously believed Earth.com
- Researchers Find Oldest Evidence Of Earth's Magnetic Field Forbes
- Researchers find oldest undisputed evidence of Earth's magnetic field Phys.org
- Ancient Rocks Reveal Earth's Magnetic Field Existed 3.7 Billion Years Ago ScienceAlert
- Earth's magnetic field formed before the planet's core, study suggests Livescience.com
أكثر...المصدر: ForumsEarth's magnetic field is much older than previously believed - Earth>com