The Fahrenheit scale is a temperature scale used primarily in the United States. It was developed by the German physicist Daniel Gabriel Fahrenheit in the early 18th century. On this scale, the freezing point of water is 32 degrees, while the boiling point is 212 degrees, creating a range of 180 degrees between these two key reference points. The Fahrenheit scale is based on a few fixed points, including the temperature of ice and salt mixtures and the average human body temperature, which is approximately 98.6 degrees Fahrenheit. While it is widely used in everyday life in the U.S., most other countries use the Celsius scale for temperature measurement.