Think your normal temperature is 98.6? Maybe not (and why that's important)
https://edition.cnn.com/2020/12/07/health/normal-body-temperature-covid-wellness/index.html
For most people around the world, it seems to be strange that normal temperature is 98.6. That's because many people around the world use celcius degree instead of fahrenheit. The former unit is common, while the latter is mainly used in the United States and a few countries.
When I went to the United States, it was confusing for me to see speed limit is written with miles.
