About 3,000 years ago in ancient Mesopotamia, brickmakers imprinted the names of their kings into clay bricks. Now, an analysis of the metal grains in those bricks has confirmed a mysterious anomaly in Earth's magnetic field.

Iron oxide baked into Mesopotamian bricks confirms ancient magnetic field anomaly

Source: space
Source Link: https://www.space.com/iron-oxide-mesopotamian-bricks-ancient-magnetic-field-anomaly