Ancient bricks from Mesopotamia recorded changes in the Earth’s magnetic field

Using bricks produced in Mesopotamia more than three thousand years ago, scientists have developed a method that allows them to determine how our planet’s magnetic field has changed and evolved over time. This, in turn, can help us make better predictions about its current and future behavior.

The results and description of the research were published in the journal Proceedings of the National Academy of Sciences (DOI: 10.1073/pnas.2313361120).

Magnetic field

The Earth’s magnetic field is a kind of shield that surrounds the planet and protects it from solar winds and cosmic radiation. Currently, the most popular dynamo theory supported by the strongest evidence (the magnetohydrodynamic dynamo theory) posits that the magnetic field is generated by streams and rotating masses of molten iron located at the core of our planet.

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