A thermometer wasn’t a singular invention but an evolving technology. One of the earliest we’ve ever found was the Philo of Byzantium which was created in the Third Century BCE.
The Roman-Greek physician Galen was the first known person to think of a temperature system set at certain degrees a fixed points. He inspired the 16th century physician Johann Hasler when he came up with ideas about measuring body temperature.
Before Daniel Gabriel Fahrenheit invented the mercury thermometer, alcohol and water were used instead. Most of these thermometers were usually filled with brandy as the choice of alcohol.
Anders Celsius came up with the temperature system that bears his name… technically. But he had it backwards as he proposed that water froze at 100 and water boiled at zero.
The largest thermometer in the world is 134 ft tall in Baker California. It was used to measure the hottest temperature in North America at the nearby Death Valley.
It is actually possible for scientists to measure the temperature of the cell. They can use a fluorescent thermometer, a molecular thermometer, or a quantum dot thermometer to do so.
interesting
People must have gone through a lot of brandy thermometers in the old days. We drove by the world’s tallest thermometer dozens of times. It was disappointing.