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4 Simple Inventions That Changed the World

By helloworldbea 197 days ago from http://bluewaveted.wordpress.com

There are many conveniences that we take for granted these days. In fact, it’s hard to imagine life without many things that were cutting edge long ago! Computers, vehicles, gas and electric ranges, sewing machines and ballpoint pens are just some of the innovations that influence daily life. The simplest inventions are what shape our world. What are these all-important devices?

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Tags: science technology history wheel


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