Related: last Sunday (December 15th) was the *luna*stice - the northernmost endpoint of the moon's 18.6 year cycle during which the rise/set points move between north and south. On Sunday it was as far north as it gets, and for the next generation it will move slowly south and then back again.
This cycle has been known to some humans for more than 3000 years, and appears to have helped structure architecture/layout at various American locations such as Chaco Canyon (New Mexico) 1000 years ago. It takes a minimum of 3 generations to establish the cycle, which indicates something about the level of social and scientific organization in these societies.
This cycle has been known to some humans for more than 3000 years, and appears to have helped structure architecture/layout at various American locations such as Chaco Canyon (New Mexico) 1000 years ago. It takes a minimum of 3 generations to establish the cycle, which indicates something about the level of social and scientific organization in these societies.