Inventions History

With X-rays, doctors detect problems human eyes can't see. X-rays are a form of invisible radiation. This powerful medical technology helps experts look inside the body and even treat illnesses. But early on, X-rays caused harm too, as people used them without enough protection. This history covers the discovery of X-rays, the development of safety standards, and the rise of more powerful and precise X-ray machines. Find out how modern doctors create digital images of the inner body—even 3D images of our brains!

The Industrial Revolution was a period of shift in Britain, continental Europe, and the USA from around 1760 until at some point between 1820 and 1840, when new production innovations were introduced. The shift from hand to device production, new chemical and iron production strategies, increased use of steam and waterpower, the development of device tools, and the rise of the mechanized factory system were all part of this change. The Industrial Revolution also introduced a period of remarkable population growth.

This history of medieval inventions, focusing on the 11th to the 14th centuries, vividly portrays a thriving era of human ingenuity, and the results are still being felt to this day. From the mechanical clock to the first eyeglasses, both of which revolutionized society, many of the commonplace devices we now take for granted had their origin in the Middle Ages. Divided into 10 thematic chapters, the accessible audiobook allows the listener to sample areas of interest or listen to the book from beginning to end for a complete historical overview.