Inventions - Investigations Author:Peter Harrison, Peter Mellett INVENTIONS, from the simplest hand tools to complex computers, both make lives easier and extend human abilities. Inventions examines the range of human inventions, from the earliest energy-saving devices through the Internet and biotechnology. Readers will find out how the first buildings were constructed, who invented anesthesia, and when th... more »e first computer was built, as well as explore the breakthroughs in scientific knowledge that key inventions have spurred. They will also discover the ways in which many inventions have revolutionized the way people live their everyday lives. Easy-to-do projects demonstrate how to make an electric motor, methods computers use to solve problems, how to create a digital image, and much more.« less