The Mayans had 5 days of the year where the gods didnt protect them from demons
They had a advanced numeral system with place value
The Mayans symbol for zero looked like a shell.
The Mayans extended from Southeastern Mexico to modern day Guatemala.
Mayan engineers developed aqueducts
Even though Palenque was a smaller city some of the best engineers lived there.
The calendar lists a 365 day cycle that ended in 2012. This is important because with the calendar they could tell when it is a goodtime to plant and harvest crops.
How did the Mayans die?
The Mayans used a dot as a symbol for one and a line for a symbol of 5 so they could go into high numbers. Because of the number system the Mayans was one of the first civilization to do mathematics.
The Mayans died from disease
Mayan engineers made aqueducts to channel water underground making more room for civilization.
The first theroriy is they died from warfare because the Mayans were warlike it could be possible they died that way. Second is disease because there was a disease on the maize which could have killed them. Third is they died from loss of food because they did slash and burn which ruined the ground making it not fertile. Last was a natural disaster.
I thin the Mayans died from disease because the Mayans top crop is maize which is what had a disease on it and since Mayans ate maize a lot it would make sense from them dieing from disease.