The inventions that were supposed to transform the world

 You do not need to be fan of science fiction movies to think about yourself, because in the 21st century we can not fly with our own jetpacks. This technology is about 100 years old, the first gas jet packet was invented by the Russian physicist Alexander Fedorovich Andrug in 1919. A number of peroxide hydrogen jet pack was built in the 1960s. Subsequently, oil turbines and jetpacks were made, but despite years of research, safety and cost were very challenging, and the jet packet market never came.