Category - Scientist’s Biography
Louis Braille Biography : Invention & Facts
Lee De Forest Biography : American Inventor, Facts
Karl Friedrich Benz Biography : Inventions and Facts
Joseph Priestley Biography : Discoveries, & Facts
Johannes Gutenberg Biography : Printing Press, Inventions & Facts
James Watt Biography : Inventor of the Modern Steam Engine
Guglielmo Marconi Biography : Inventions, Radio, & Facts
George Stephenson Biography : Locomotives, & Facts
