A scientist once described how "the modern world overwhelmed people with data and that this overabundance was both "confusing and harmful" to the mind." That was Conrad Gessner, sharing his views in 1565, concerns about the printing press!! Are we adequately considering the effects of the technology we build? Does exposure to tech, towers, and radio frequencies hurt humans? Mark Stross, America's technologist, explains the evidence so you know what you need to know, and feel good about it.