Belizean archaeological Tour Guides like to Joke about the 'what happened to the Maya' question, pointing out that they are Maya and standing in front of you.
New info has come to light on the subject because of recent code cracking of the Maya language.
National Geographic August, has some interesting new ideas. and shows the Maya in a new light.

'Scholars have long puzzled over the Maya civilization's rise to glory and fall to ruin. The latest thinking is that a man named Fire Is Born made the Maya great. But no one person or problem caused the collapse. Simply put, everything went wrong.'
http://www7.nationalgeographic.com/ngm/0708/feature2/
Interesting treatment of Belize in this edition it says we speak 5 languages in Belize one of which is Creo?
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The Dive Shops Daily Blog
http://scubalessonsbelize.blogspot.com/