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3h 21min, jan 30, 132 y BC - the first tool used for seismology made by Chang Heng 132 ce
Added to timeline:
plate techtonic 1770- 2000
By
spicy boi
28 Nov 2017
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501
Date:
3h 21min, jan 30, 132 y BC
Now
~ 2159 years ago
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