Did you know? The last polar reversal, known as the Laschamp excursion, occurred around 41,000 to 42,000 years ago, shifting the north magnetic pole to the southern hemisphere and back again.

The image is a two-panel photo collage showing a massive, ancient, petrified tree trunk lying horizontally in a muddy, open field. The top panel shows the full length of the tree, with a vehicle visible in the background. The bottom panel shows a person in an orange jacket standing next to the tree for scale, emphasizing its enormous size. The text overlay at the bottom states: 'An Ancient tree discovered in New Zealand contains a 42,000-year-old record of a reversal of Earth's magnetic field.'

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