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Earth sciences

Earth sciences

Early Earth’s magnetic field strength was similar to today’s

30 May 2024 Isabelle Dumé
Photo of a grey rock containing white ripples
Well preserved: An example of the 3.7-billion-year-old banded iron formation that is found in the northeastern part of the Isua Supracrustal Belt. (Courtesy: Claire Nichols)
Ancient organisms preserved in the Earth’s oldest fossils may have experienced a planetary magneti

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Isabelle Dumé is a contributing editor to Physics World
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