The introduction, Euclid, Archimedes and Hipparchus and Ptomeny. Initially I podcast while on an exercise bike until it is pointed out that it sounds as I am reading in the middle of sex. The latter I read and hit the wall in fatigue sorry. I find the precession of the equinox an rather interesting happening making the star signs inaccurate by today's standard. I am also intrigued that the equinox is when the sun's path through the ecliptic passes through the equator. MP4 recording     MP3 recording -- -- Your browser does not support the audio element.