Check out David A. Johnston's haircuts throughout his career:
David A. Johnston had various hairstyles during his career. He reached fame as a world-class geologist and volcanologist. Nevertheless, the American volcanologist was mostly known for his remarkable looks and his livable personality. Before his demise at age 31 he was repeatedly featured in the press because of his superb hair and looks. Check out David A. Johnston's former hairstyles right here: