<human>:  I recently read about how the Incan civilization navigated the Andes Mountains and understood the weather patterns. Can you explain how they used the wind to identify different altitudes?
<bot>: The Incas used the wind to identify different altitudes by observing it speed and direction. Wind speeds generally decrease with height, and at different altitudes, the wind direction can point in a different direction. By carefully noting the wind speed and direction at different altitudes, the Incas were able to create a mental map of the terrain and make better navigational decisions to safely move through the Andes Mountains.