Ancient Lava Reveals Earth's Magnetic Field Really Does Have a Cycle of 200M Years – ScienceAlert

Science News

1. Ancient Lava Reveals Earth’s Magnetic Field Really Does Have a Cycle of 200M Years  ScienceAlert
2. Unlocking the Secrets of Earth’s Magnetic Field From 9,000-Year-Old Recordings  SciTechDaily
3. Israeli researchers study ancient flint to measure magnetic field  The Jerusalem Post
4. View Full Coverage on Google News

Source: Science News