The Fahrenheit (°F) scale, developed by German physicist Daniel Gabriel Fahrenheit, is primarily used in the United States and a few other countries. It is related to the Celsius scale through ...

In most of the world (except for the United States, Jamaica, and a few other countries), the degree Celsius scale is used for most temperature measuring purposes. The entire scientific world (the ...

Building a thermometer is a matter of precise technology—putting just the right amount of mercury into a specially designed glass tube, for instance—but determining which numbers to use on the ...