Contrary to popular belief, Thomas Alva Edison didn't "invent" the light bulb, but rather he improved upon a 50-year-old idea. In 1809, Humphry Davy, an English chemist, invented the first electric...
British scientist Sir Joseph Wilson Swan invented the modern light bulb in 1878, and American inventor Thomas Alva Edison independently made a similar invention in 1879. Edison is usually given...