The history of science is riddled with discoveries and inventions. Some made our lives brighter (sound cinema, color photography, video games) and more convenient (light bulbs, trams, steam engine), others destroyed our idea of ​ ​ the impossible (cloning). Some frightened (an airplane with a nuclear reactor, chemical weapons, the discovery of viruses and new diseases), others gave hope (the invention of a gas mask, parachute, tomography). The authors of the popular science portal will tell about these and other facts from the history of science Indicator.ru.