Telephone And Radio
Detroit policeman William L. Potts is credited with inventing the modern street traffic light in 1920. He worked out an electric light system that allowed him to control three street intersections from one tower He picked the red, yellow and green because railroads used them.
the gravitational forces from nearby solar systems allowed a nebula to form and in that nebula were all the compounds needed to form the sun and planets.
skylab
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the moon has no atomoshere
samuel F.B. morse
Samuel F.B. Morseyour qay :)
the internet allowed people to communicate globally and almost instantly
it allowed people to send messages almost instantly (NovaNet)
it allowed people to send messages almost instantly (NovaNet)
Abraham Lincoln was the first president to be able to talk with his officers on the spot using the newly invented telegram. This allowed near instantaneous communication was something the south didn't have which left them at a disadvantage.
Thomas Edison invented many gadgets that improved the world of communication. From the phonograph to the telegraph to the telephone, his contributions to science are unending. The telephone, however, is a form of communication that has been improved many times over the decades and is a great way to communicate ideas, emotions, and many other things between people.
His invention, the telegraph, was used for communication. It presented a faster and easier way to communicate rather than through letters.
The Internet made mass communication through E-mail, instant messages and social networking sites. This allowed people to communicate faster and much easier than before.
The telegraph was the first invention that allowed people to communicate rapidly at great distances. Today, we can communicate much better by telephone, or by email, etc., but when the telegraph was invented there were no phones or other such inventions.
The telegraph was the first invention that allowed people to communicate rapidly at great distances. Today, we can communicate much better by telephone, or by email, etc., but when the telegraph was invented there were no phones or other such inventions.
Any communication other than by direct face to face contact requires the use of technology. Writing is one early technology that allowed people to communicate at a distance.