#5 P1 Ralph Ellis: Predynastic Stone Vases used Royal Cubit Metrology

Ralph Ellis discovers that the ancient precision hard stone vases were made using a 5000+ year old system of measurement, adding to the overwhelming evidence that these are indeed ancient artifacts and not modern reproductions. But it is impossible to achieve this precision by hand with primitive tools. Were our ancestors more advanced than we think? Were these inherited by the Egyptians? When were these really manufactured?