History of taxonomy, the science of classifying organisms. It traces the development of the “tree of life” from Linnaeus’s initial two-kingdom system through the addition of new kingdoms and the shift to a three-domain system based on genetic analysis.

Historical development of microbiology, highlighting the ancient use of microbial fermentation and the early understanding of disease transmission. It explores how the invention of the microscope and the discoveries of Pasteur and Koch marked the “Golden Age of Microbiology” and led to advances in understanding the unseen world of microbes.