Famous Scientists and Experiments By lizsolaimanian Jul 7, 1609 Gailileo Heliocentric Model Galileo Galilei Jun 17, 1665 Robert Hooke Microscope Robert Hook Cells Sep 16, 1796 Edward Jenner Vaccine Edward Jenner First Vaccine Aug 20, 1859 Charles Darwin Origin of Species Jun 17, 1863 Gregor Mendel Gregor Mendel Patterns of Inheritance Feb 5, 1897 JJ Thompson Discovery of Neutron