[Music] [Music] because the shift from one zodiacal house to another takes more than two millennia scholars wondered how and where Hipparchus could have learned of the precession in the second century BC it is now clear that his source was Sumerian professor Langdon's findings revealed that the Nepean calendar established circa 4400 BC in the Age of Taurus reflects knowledge of the precession and the shift of zodiacal houses that took place 2160 years earlier than that professor Jeremiah's who correlated Mesopotamian astronomical texts with