| Contribution | Scientist's name | Other hint |
| Developed first compound microscope | |
| Cloth merchant who made lenses that magnified up to 300x | |
| This pair of scientists came up with the 'Cell Theory' | |
| First documented the theory of Spontaneous Generation | |
| Disproved spontaneous generation of maggots | |
| Found that broth would go bad because of microorganisms and claimed it as proof of abiogenesis | |
| Boiled gravy for a long time and completely sealed container, resulting in disproving abiogenesis. | |
| Layed Spontaneous Generation debate to rest with his Swan Neck Flask and proved microbes were living in the air. | |
| Thought diseases could be transmitted on the hands of physicians and therefore developed hand washing with chlorine solutions to kill mircrobes | |
| Sterilized surgical instruments and wore surgical gloves to get rid of microbes that could cause infection | |