Everyone knows sort of what the telegraph is and how it works. Ex: War movies, Mars Code, Telegraph Poles (In Turkey, we even have a song for them) But, I never get how the mechanism works? Never interested in learning till today.
Why was the need for Telepgrah back in the early 1800s? The more you know the basics of early inventions, the more chance to understand what discovery drove which innovation and new creation. Why you need this?
You can connect easily the dots and fully understand the basic principles of life.