Aztecs

The Aztecs
The journey of the Aztec people to becoming one of the most widely known Pre-Columbian Mesoamerican civilization began with them crossing over the Bering Strait while following the mammoth herds...

Maya

Maya Calendar
The Mayans had an elaborate calendrical system, no longer in use, which obviously evolved in complete isolation from those of the old world. This system ended with the fall of the Mayan civilization.