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If in 1687 Isaac Newton he had not published the laws of the motion, humanity would not have been able to construct functional transport systems like the airplane.
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If in 1778 Joseph Priestley and Antoine Laurent Lavoisier had not discovered the existence of oxygen, the oxygen tanks would not have been invented
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If in the 18th century Edward Jenner had not created the first smallpox vaccine, at the present time the scientists would not have uncovered other vaccines against many other diseases
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If in 1846 a group of doctors had not discovered anesthesia, the people would have suffered the whole pain caused due to a surgery.
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If in 1847 doctor Ignaz Semmelweis he had not discovered the existence of the germs, at the present time they would not have been able to heal the diseases caused by these.
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If in 1860 John Wesley Hyatt he had not uncovered a named plastic polymer, the industry in general he would not have evolved so quickly, since plastic is used in everything.
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If in 1896 the French physicist Antoine Henri Becquerel had not discovered the existence of the radiation, at the present time we would not have been able to use X-rays.
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If in 1897 the English physicist Joseph John Thomson had not uncovered cathode ray tubes, we would not have invented the television neither a laptop
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If in 1900 Karl Landsteiner he had not discovered that there are different kinds of blood, million people would have died due to the absence of blood transfusions.
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If to beginning of the 20th century the physicist Victor Hess had not discovered the existence of the cosmic radiation, we would not have known one of the causes of cancer.
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