ELI5: Explain Like I'm 5

Transatlantic telegraph cable

Okay kiddo, imagine you are trying to send a message to your friend who lives really far away on the other side of the ocean. How would you do it? Well, you could write a letter, put it in an envelope, stick a stamp on it, and send it through the mail. But what if you want to send a message really quickly? That's where the transatlantic telegraph cable comes in!

A telegraph is a device that can send messages over long distances using wires. A telegraph cable is a big, long wire that stretches across the ocean floor from one continent to another. Scientists and engineers worked really hard to design and build a telegraph cable that could do just that. They wanted to connect North America and Europe, so people could send messages quickly and easily across the Atlantic Ocean.

The first transatlantic telegraph cable was completed in 1858. It was made up of a long, thin wire covered in insulation (a special material that keeps electricity from leaking out) and wrapped in layers of metal to protect it from the water and rocks on the ocean floor. The cable was loaded onto a big, special ship called a cable-laying vessel, which carefully sailed across the ocean from one side to the other.

Once the cable was laid, people could send messages back and forth almost instantly. They used a special machine called a telegraph key, which sent electrical signals along the wire. The signals were translated into letters and words on the other end by a telegraph operator. It was like magic!

But, like many things, the transatlantic telegraph cable had some problems. A few weeks after it was completed, the cable stopped working because of a technical issue. It took several more attempts over the years to get it working again. Eventually, newer technologies like radio and satellites made the telegraph cable less important, but it was an amazing feat of engineering that helped connect people across the world in a whole new way.