Most likely because of the mayans mysterious disappearance as an entire civilization. heres an example, http://mayanarchaeology.tripod.com/id2.html
"All of the Mayans did not disappear; although millions did vanish, all at once, about 1,200 years ago, in the ninth century AD. "
Its the link you posted and quoted from..............................
Youve cherry picked one line and ignored the rest of the data
Here is your quote in its entirety........
All of the Mayans did not disappear; although millions did vanish, all at once, about 1,200 years ago, in the ninth century AD. There are many, many Mayans living today, principally in Guatemala. There are approximately 5 million Mayans living today in Guatemala and southern Mexico. There are approximately 20,000 of them living in southern California. These fled the Guatemalan persecution by the army in the 1980's.
More recent investigations into the mass disappearance in the 9th century presents fairly conclusive data that this is what happened to millions of Mayans: In the Tikal area of Guatemala, there are relatively no rivers or lakes. Careful examination of this city shows that the area surrounding the temples and the plaza is slopped, sending the rain "run off" into deep reservoirs, one of which is about 125 feet deep. First, meteorologically, it has been determined that when the northern Atlantic area turns extremely cold, that the normal tropical rain band of Central America is pushed further south, into the northern part of South America. Secondly, scientific investigations of the ice in the far north, using ice
"coring" techniques have shown that the deep core corresponding to the 9th century A.D. shows an extremely low ammonia content, which indicates a time of extreme cold in the north Atlantic. Thirdly, three geologists taking "core" samples from a lake bottom in the Yucatan area of Mexico, found a white colored band which indicated a time of extremely low moisture.
Fortunately, within the white band, a seed was found. This seed was sent to be "dated". Its date showed it was 1,200 years old; the 9th century AD; the exact time when millions of Mayans disappeared, and their construction stopped. What happened to the Mayans? The answer seems to be that a prolonged drought resulted in no drinking water, nor water for plants and animals. Millions of them died of thirst and hunger.
Their majestic culture, along with the building of further great pyramids stopped.
If anyone is guilty of dis information here its you, you cherry picked one line about millions disapearing, and ignore the data as to why they did, then use this cherry picked data to create a "mystery" where none exists
Thats deliberate disinfo