Why are means of communication always developing
Only a few hundred years ago, the fastest way a piece of news could travel was to be carried by a person on horseback. Messages sent overseas could only travel as fast as the fastest sailing ship. The breakthough came with the invention of the electric telegraph and messages in Morse Code. The message was sent down a wire in bursts of electric current. Today, however, images of written documents, sound recordings or television pictures can be flashed around the globe in less than a second by means of satellites and radio communications. Several satellites, in different orbits, are required to give coverage over the whole globe, and different satellites are used to reflect signals for different media, such as telephone messages and television pictures.
