The Americas
Mayan, Aztec, and Incan CIvilizations
Mayan Civilization
Chichén Itźa
Aztec Civilization
Tenochtitlan
Incan CIvilization
Cuzco
Machu Picchu
The Mayan Calendar
The Mayans had a 365-day calendar that was based on the solar year, called the haab, which included 18 months with 20 days each. The other 5 days were considered unlucky.
Anti spasmodic medication
The Aztecs were very skilled in medical surgeries and used passionflower to relax muscles during surgeries to make to operation more successful.
Quipus
The Incas created the quipu, which was used to tell a story of how many of this and what was going on.