12. They Had A Highly Developed Writing System
The Mayans were the only ancient civilization in the Americas to invent a written language of their own! In fact, their language was so sophisticated that it is comparable to modern languages in their complexity, and what they can convey!
The Mayan language had over 800 characters and was a mix of hieroglyphs (pictures of objects used as symbols) and signs used to convey phonetics. A Siberian American architect, Tatiana Proskouriakoff, deciphered this mysterious language in 1960, allowing us to unlock the secrets in their books and scripts!