Add Yahoo as a preferred source to see more of our stories on Google. Red and white aviation marker balls on a series of power lines and telecommunications cables - Olga Ilina/Shutterstock The sun is ...

We've all seen the orange, yellow, or white balls on power lines, while driving or walking past them. The colored balls seem to always be there, and there's a good reason for that: The safety of ...

If you have paid close attention to power lines, you might have noticed metal spring-like structures close to the transmission towers. These spring-like structures are known as lightning arresters, ...

Have you ever looked up while driving on a highway and spotted those big orange balls hanging on power lines? They look a bit ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. What are those orange balls on some power lines?