(2) Thomas Edison
The sheer scope of Edison's inventiveness is staggering. The Wizard of Menlo Park held a record 1,093 patents when he died in 1931. Everyone knows him for the light bulb, but Edison also had a hand in the invention of the radio, the phonograph, and an improved stock ticker. His achievements weren't all nerdy science, either; Edison's electric engraving pen needed just a few modifications to become the world's first tattooing machine.
(7) Nikola Tesla... READ ON