Earth's magnetic field can flip faster than previously thought

The video discusses Earth's magnetic field, which protects the planet from solar particles. It explains geomagnetic reversal, a phenomenon where the magnetic field switches direction, occurring slowly over thousands of years. A recent study of a Chinese stalagmite revealed a rapid polarity shift 98,000 years ago. The video also highlights the potential impact of a weakened magnetic field on power grids and electronics.

Describe the significance of the polarity shift that occurred 98,000 years ago.

What impact could a magnetic field reversal have on modern technology?