Brian Sherwood Jones sent in this link on the Maya calendar – go to http://cryptome.org/2013/03/nsa-mayan-astronomy.pdf
Calendrical paper, must read
20 April 2013Astronomy
Astronomy
Astronomy
Astronomy
Brian Sherwood Jones sent in this link on the Maya calendar – go to http://cryptome.org/2013/03/nsa-mayan-astronomy.pdf