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Earth's magnetic field nearly collapsed some 590 million years ago, presumably putting life on the planet's surface at risk of a rise in cosmic radiation.
"Earth's magnetic field was in a highly unusual state when macroscopic animals of the Ediacara fauna diversified and thrived," University of Rochester Earth scientist Wentao Huang and colleaguesthat those samples indicated Earth's magnetic field weakened to its lowest known level about 565 million years old, during theHowever, it was long thought that a vanishingly small magnetic field would be harmful to emerging life, because Earth's magnetic fieldthat Earth's...
Combining their results with those of the 2019 Canadian study, Huang and colleagues conclude that this lowly magnetic field lasted for at least 26 million years, from 591 to 565 million years ago. "The new data confirming and extending the UL-TAFI strengthen a potential linkage with the Ediacaran evolution of macroscopic animals," Huang and colleagues
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