For anyone who wants to delve into the history of science and technology, 30,000 Years of Invention provides a chronological look at the break­ throughs, discoveries, and systems of inventions that have changed human life. From the discovery of fire to the invention of the steam engine and the Pentium chip, readers will learn the details and significance of man’s greatest achievements. Histories great inventions include aerosol spray, algebra, Archimedes’ Principle, barbed wire, canned food, carburettor, circulation of blood, condom, encryption machine, global positioning system, fork, fuel cell, hourglass, latitude, microwave oven, music synthesizer, radar, steel, television, the internet, traffic lights and velcro.