What tool has allowed scientists to learn about the characteristics of earths layers

DillPixel asked Oct 11, 2023

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35 votes

DillPixel asked Oct 11, 2023

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13 votes

a seismograph, they can detect very little movements in the ground. first idea of it created in 132 CE by Chang Heng. developed in 1890

Matthew Weber answered Oct 18, 2023

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