And at the Mayan site Chichen Itza in Mexico ... into three-month seasons based on annual temperature cycles. By that calendar, spring starts on March 1, summer on June 1, fall on Sept.
There has been a lot of chatter in parts of the online world this week about the supposed discovery of a hidden complex of ...
And at the Mayan site Chichen Itza in Mexico ... into three-month seasons based on annual temperature cycles. By that calendar, spring starts on March 1, summer on June 1, fall on Sept.