About the book: 2021 / How many inventors and scientists who are undeservedly forgotten or known thanks to completely different merits. We enjoy the fruits of their labors and don’t even think about who was behind the discovery of many things familiar to us. Do you know who invented the camouflage pattern that has long been familiar to us? Did you know that the first odometer was invented before our era? Have you thought about whose bright mind came up with our favorite color television? Could you imagine that the screw of a simple modern meat grinder works according to the Archimedes principle? Inquisitive readers will find answers to these and many other questions in this book. Publishing layout saved in PDF A4 format.