It comes from deep space and from the sun. It zooms at you from nuclear power plants, microwaves, mobiles, CT scanners and mammogram machines. You cannot see, hear, smell or feel it, but there is never a moment when it isn 't flying through your body. Too much of it will kill you, but without it you wouldn 't make it through a year. This is the story of all the light we cannot see. Bob Berman traces infrared, microwaves, ultraviolet, X-rays, gamma rays, radio waves and other forms of radiation from their historic, world-altering discoveries in the 19th century to their role in our world today. He sets the record straight on costs and benefits to our health and peeks into the future to see how invisible light will make waves in medicine and computing. Packed with fun facts, fascinating tales and eureka! ' moments, Zapped will delight anyone interested in gaining a deeper understanding of our world.