Answer:
1. Exactly how the Mayan Empire met its end is really not known.
2. The Mayans were one of the first people to use the symbol for zero.
3. Mayans never used steel or iron. All their weapons were made of volcanic rock known as obsidian.
4. Mayans were literate people and they came up with their own writing system which was one of the most complex writing systems to have ever existed on this planet.
5. Mayans made use of different calendars