Post No: 633645 December 24, 2016, 01:50PM
Guest wrote:

"It's the only relatively high civilization for it's time to have occurred in a tropical reoqon.&iuot;Hgw about Pakistan and India?At any rate, the Yucatan geology is quite fascinating, with its lime stone fissures and underground rivers/ cenotes. It is easy to see that a drop in fresh water levels would be devastating. Also, there is very little top soil - such that formerly agriculturally used areas take hundreds of years to revert to anything resembling rain forest.

Type the characters that you see in the box (5 characters).

This is a captcha-picture.