Thomas Alva Edison’s astonishing story of bulb : 15 year old boy’s Idea
Thomas Alva Edison one of the greatest inventors ever. He was photographed next to a lightbulb so often that people came to believe he invented it. But he didn’t. Several inventors had demonstrated various versions of incandescent lights before he patented the first commercially successful lightbulb. He never crafted something out of nothing. His genius … Read more