1. Paleomagnetic Study Suggests Earth’s Magnetic Field Weakens Every 200 Million Years  Forbes
  2. Ancient Lava Reveals Earth's Magnetic Field Really Does Have a Cycle of 200M Years  ScienceAlert
  3. Unlocking the Secrets of Earth’s Magnetic Field From 9,000-Year-Old Recordings  SciTechDaily
  4. View Full coverage on Google News

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