History of Biotech Timeline By JordanSherrill1 Jan 24, 1600 Hooke invented microscope Jan 24, 1675 Leeuwenhock discovers bacteria Jan 24, 1920 Alexander Fleming discovered penicillium Jan 24, 1930 Artifical Insemination used in US Jan 24, 1953 Discoveary of DNA Jan 24, 1970 Embryo Tranfers Jan 24, 1980 Scientist learned how to transfer DNA from one organism to another