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3.200 A.C. If the Mesopotamians had not invented the wheel, probably all the human beings we would have to walk and the life of all would be more healthy with less contamination.
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If the Europeans had not developed the firearms, perhaps the humanity would have less wars in his history and the world would be a little calmer and full of peace.
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If the Scot James Watt had not invented the steam engine, the role of the man in the industry would be more important.
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If Humpry Davy had not discovered the anesthesia, it would not be possible to do many medical surgeries. Neither we might recover of many illnesses.
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If Alexander Graham Bell had not invent the phone, nowadays none of us could communicate with his family in other places of the world.
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If Clément Ader had not invented the airplane, probably the persons would never have the possibility of flying.
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If Alexander Fleming had not discovered the penicillin, many of the infections provoked by bacteria would be mortal and they would generate many deaths about the world
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If the Russians had not launched the first artificial satellite, surely USA would have launched, nevertheless, the launch meant a big advance in the telecommunications.
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If the science had not invented Internet, surely we would not have so much available information in any moment and place.
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If apple had not invented the Ipod, all of us still would use a Walkman to listen to music.
