HISTORY_300 · SLOT 230
China, 1031 CE
Scientist who discovered magnetic declination and first described the magnetic needle compass.
RAW SOURCE CLAIM · NOT ASSESSEDChina, 1031 CE
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Scientist who discovered magnetic declination and first described the magnetic needle compass.
RAW SOURCE CLAIM · NOT ASSESSEDThis profile is a research seed. Source claims must pass the Source Record, Counter-Evidence, C/H/P assessment, audit and consensus gates before a ZERO2ONE position can be published.