Learn more about technologyandthefuture with this collection
The historical significance of urban centers
The impact of cultural and technological advances
The role of urban centers in shaping society
The telegraph and Morse code
In 1835, inventors Joseph Henry and Edward Davey independently demonstrated electromagnetic relay, where a weak electrical signal can be amplified and transmitted across long distances. Cooke and Wheatstone invented the telegraph shortly after.
A few years later, Samuel Morse developed a version that sent signals from Washington D.C. to Baltimore. Afterwards, he developed a system of signal-induced indentations that correlated to numbers, special characters, and letters of the alphabet, known as the Morse code.
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Long-distance communication
- The Greeks used messenger pigeons to deliver the results of the first Olympiad in the year 776 B.C. They also established a library in 530 B.C.
- Near the end of the B.C. period, systems of long-distance communication became more commonplace. In Egypt and China, messenger relay stati...
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The telephone and answering machines
The next idea to explore was finding a way to transmit sound to far distances. Alexander Graham Bell laid out the underlying technology for electromagnetic telephones and was granted a patent in 1876 for his improvements in telegraphy.
This introduced a new problem: what if you were not av...
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The phonetic system
- The phonetic system does not use pictorial signs but symbols to refer to spoken sounds. Modern alphabets that many people in the world use today represent a phonetic form of communication.
- Remnants of these systems appeared either around 19th century B.C. from the early Canaanite p...
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Written communication during the BCE Years
The Kish tablet is dated to 3500 B.C. and is considered by some experts to be the oldest form of known handwriting. It features proto-cuneiform signs - symbols that resemble a physical object. The Egyptian hieroglyphs are similar to this form of writing and date back to 3200 B.C.
Written l...
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The invention of paper and moveable type
- In 105 China, an official Cai Lung suggested using "the bark of trees, remnants of hemp, rags of cloth, and fishing nets" for writing on instead of heavier bamboo or costlier silk material.
- The Chinese followed that up with the invention of the first clay moveable type for printing...
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TELEGRAPH
Samuel Morse was with friends and debating electromagnetism when he realized that if an electrical signal could travel instantly across a wire, why couldn't information do the same?
The telegraph was invented by not only Morse, but also Charles Wheatstone...
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