Nixie Tube
There are so many things in this world that we have no clue about. Which makes a lot of sense when you think about it considering there are so many different people, different countries, and different time periods that people have lived through.
This device right here is a perfect example of exactly that. The Nixie tube is an electronic device for displaying numerals. This little device is filled with different gases and materials that merge together to produce numerals.