There are many inventions that have caused great changes in the world. Here’s a short introduction. For example, the digital camera was invented by Steven J.Sasson. It was invented in 1975 and it is used for taking photos. The telephone was invented by Alexander Bell in 1876. It’s used for communicating with others. The radio was invented by Guglielmo Marconi in 1895. It’s used for listening to news and music.
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