The Mayans lived in Mexico. Around the time 400 BCE. But they ended about 800 C.E.
Mayans use rubber for balls
The Mayans number system was important because it was one of the first in the world. The Mayans had only three symbols that could be used for 0-19
Eventually the Mayans started to disappear
This won't kill me.
The Mayans had great temples which were often used for sacrifice's. The temples were also sometimes used for the living quarters for the king.
Before the invention of vulcanization Mayans were making rubber sometimes it was used for balls.
There are several theories about how they disappeared.One is they died from war. Another is disease. The other is famine. The last one is environmental change. Its likely a famine wouldn't do it because it would end eventually.
I believe they died out from war. Because of their religion and for land. That is how I believed they disappeared.