There are events in the history of human civilization that change dramatically the fates of people and countries. The events of the first kind - wars, political revolutions and other man-caused cataclysms - come with a bang leaving destruction and death behind and overturning the lives of the survivors. Yet, very often some other events change the course of history in a way not less dramatic although they usually remain unnoticed. These are the discoveries and technological revolutions related to them. Some 2,500 years ago, scientific and philosophical schools emerge at different places around the globe (Egypt, Greece and China) and their achievements are respected even today. The Earth radius was calculated with an error of 1%, irrational numbers were discovered, the definite integral was essentially defined, accurate astronomical models were built, the first calculating devices emerged, the steam engine was invented (yes, it was as early as that).