Roughly 2,900 kilometres beneath your feet, where Earth's solid mantle gives way to its molten outer core, scientists have just found nearly 175,000 signals nobody had properly catalogued before, more than ten times what every previous study combined had managed.

The scientists from the Institute of Geology and Geophysics, Chinese Academy of Sciences, have developed a deep learning algorithm designed to detect PKP precursors: weak seismic waves that precede strong waves when scattered off the........

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