Leeuwenhoek invent the famous single-lens microscope and bacteria was seen for the first time.
Edward Jenner's Discovery
Edward Jenner performed the first vaccination by taking the pus of a cowpox lesion of an infected person. Then he placed the pus on a person so they could fight off cowpox and fight it off again and again.
Theodor Schwann discovered Pepsin, it was also discovered that starch turning into liquid is a chemical process.
mRNA is discovered byJacob and Monod.
Mendel's rules of Heredity get published.
Rous discovers the first cancer-causing virus.
Evans and Long discover the human growth hormone.
Discovery of Penicillin
Alexander Fleming accidentally discovered penicillin.
It is demonstrated by McCarty, Avery, and MacCleod that DNA is is the "transforming factor" and the material of genes.
It is discovered that the DNA composition of humans is 99% that of a gorilla or chimpanzee.