Art Berman on Twitter: "@chigrl Earth's magnetic field has reversed its polarity (direction) hundreds of times during the past several hundred million years. Here is a good summary article: https://t.co/PA1V2i3TSj https://t.co/OcLur0bMTI" /
Reversal of the Earth's Magnetic Field: What Does It Mean For Life on Earth — Canada (Ontario) Beneath Our Feet
Reversal of the Earth's Magnetic Field: What Does It Mean For Life on Earth — Canada (Ontario) Beneath Our Feet
![Cartoon structure of magnetic field lines in a “Normal” polarity field... | Download Scientific Diagram Cartoon structure of magnetic field lines in a “Normal” polarity field... | Download Scientific Diagram](https://www.researchgate.net/profile/Joseph-Meert/publication/259043032/figure/fig4/AS:268796837494812@1441097568795/Cartoon-structure-of-magnetic-field-lines-in-a-Normal-polarity-field-a-a-Reverse.png)