1969 Birthday Linus Torvalds, born in Helsinki, Finland, inventor, software engineer, pioneered development of the Linux kernel, a free, open source software operating system 1883 Birthday Ernest E Just, biologist, pioneered cell division 1879 Birthday Edward Steichen, pioneered American photography 1866 Birthday Adolf Meyer, U.S., psychiatrist/neurologist, pioneered mental hygiene 1860 Birthday Will Keith Kellogg, born in America, vegetarian, founder of Kellogg Company, pioneered process of making flaked cereal, promoted corn flakes as a healthy breakfast cereal 1846 Birthday Charles Edward Pickering, pioneered American spectroscopist 1843 Birthday Susan Elizabeth Blow, U.S., pioneered kindergarten education 1830 Birthday Eadweard Muybridge, born in England, pioneered study of motion, photography 1828 Birthday Jules Verne, born in France, pioneered sci-fi, From the Earth to the Moon 1815 Birthday Horace Wells, dentist, pioneered use of medical anethesia 1796 Birthday Horace Mann, U.S., educator/author/editor, pioneered public schools 1771 Birthday Ephraim McDowell, surgeon, pioneered abdominal surgery 1755 Birthday Oliver Evans, pioneered high-pressure steam engine