This clip is about microscopes and its development. It begins a CU of bacteria. Various shots of various bacteria. A CU of a drawing of bacteria in a book. A drawing of an old woman in pain being poked by little devils. Drawings of London. A shot of Robert Hook’s version of the microscope. A CU of the microscope. A shot of a leave under a microscope. A shot of Hook’s diagram. A similar shot but an image taken from an electron microscope. A CU of a flea. A diagram of a flea.