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Rocks of Paraíba Kept the Memory of a Much Weaker Earth Magnetic Field Just During an Explosion of Ancient Life
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Rocks formed about 525 million years ago in Itabaiana, Paraíba, revealed that the earth's magnetic field remained exceptionally weak during Cambrian, a period marked by the diversification of marine animals. Published in Science Advances, in July 2026, the research indicates that this condition persisted for tens of millions of years, contradicting models...
·São Paulo, Brazil
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