BC1750The Sumerians brew beer
500 The Chinese use moldy soybean curds as an antibiotic to treat boils
250 The Greeks practice crop rotation to maximize soil fertility
100 Powdered chrysanthemum is used in China as an insecticide
AD: Before the 20th Century1590The microscope is invented by Janssen
1663 Cells are first described by Hooke
1675 Leeuwenhoek discovers protozoa and bacteria
1797 Jenner inoculates a child with a viral vaccine to protect him from smallpox
1802 The word "biology" first appears
1824 Dutrochet discovers that tissue is composed of living cells
1830 Proteins are discovered
1833 The cell nucleus is discovered
The first enzymes are isolated
1855 The Escherichia coli bacterium is discovered
It later becomes a major research, development, and production tool for biotechnol