Incan people used knots to keep track of records. These knots were also tied to pendants and cords. The knots are better known as quipu and their meanings would depend on their position on the cord. Over 600 examples of quipu have been discovered already.
100 Mind-Blowing Incan Facts
Machu Picchu is 100% handmade. You read that right – Machu Picchu is the best remaining example of Incan engineering. No tools, wheels, or animals were used in constructing the royal estate. Instead, hundreds of men pushed up 50-ton rocks or scaled the mountain to form what we now know as the Incan ruins.