Paleomagnetism
Researchers at Yale University have proposed a new model explaining the dramatic fluctuations in Earth's magnetic field during the Ediacaran Period, from 630 to 540 million years ago. Their analysis of rocks from Morocco suggests these changes followed a structured global pattern rather than random chaos. The findings, published in Science Advances, could improve reconstructions of ancient continents.
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Harvard geoscientists have found the oldest direct evidence of plate tectonics on Earth, dating back 3.5 billion years. Analysis of ancient rocks from western Australia reveals early crustal drift and rotation. The discovery, published in Science, challenges notions of a rigid early planetary surface.