Since the time of the Portuguese sailors of the 15th century man has developed many new ways of communicating, what are they and in when were these new methods developed?

Research: printing press, telegraph, railroads, planes, dirigibles, steamboats, radio, television, internet, telephones, cell phones, Blackberries, etc.

Since the 15th century, man has indeed developed many new ways of communicating. Here are some of the major developments in communication methods and their respective time periods:

1. Postal Service: The first organized postal service was established in the 16th century. It allowed people to send written messages across long distances by utilizing a system of post offices and mail carriers.

2. Telegraph: The telegraph was developed in the early 19th century. It used electrical signals to transmit messages over long distances using Morse code. This invention revolutionized long-distance communication and played a significant role in the spread of news and information.

3. Telephone: Alexander Graham Bell patented the telephone in 1876. This invention allowed people to have real-time voice conversations with others over long distances.

4. Radio: In the late 19th to early 20th century, radio technology emerged. It used electromagnetic radio waves to transmit audio signals wirelessly. This innovation enabled the broadcast of news, entertainment, and music to a wide audience.

5. Television: Television became widely available in the mid-20th century. It allowed for the transmission and reception of moving images and sound, significantly expanding the possibilities for visual communication and entertainment.

6. Internet: The development of the internet began in the late 20th century and has since transformed communication on a global scale. The internet enables information sharing, real-time communication, and the exchange of various media formats, such as text, images, audio, and video.

It's important to note that these are just a few examples of the numerous advancements in communication methods over the centuries.