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Ancient solar eclipse records reveal how Earth’s rotation has changed

Records of eclipses observed around 1,500 years ago have revealed the history of Earth’s rotation and how our planet’s movement has changed through recent human history.

Researchers searched through records from the Byzantine Empire  — the eastern half of the Roman Empire that continued on after the fall of the Western Roman Empire — from  the fourth to seventh centuries A.D. — and identified five total solar eclipses seen around the Eastern Mediterranean, pinpointing their probable times and locations. Previously, solar eclipse accounts from this time were sparse. 

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