Cycle of the ages: The Great Year.

How far back into history do humankind's roots go? What did the ancients know about the stars and their movements and what can we learn from them? How was the precession of the equinox, the slow progression of the stars across the sky over thousands of years, used to mark the rise and fall of great ages by the ancients? Many cultures spoke of an unseen sun that drives precession and causes the cycle of the great year. could there be an unseen binary partner to our sun? The Great Year examines this theory and finds that perhaps these ancients were really into something !