INVENTED THE MICROSCOPE IN 1590

MADE THE FIRST THERMOMETER IN 1714

USED THE MICROSCOPE TO LOOK AT RED BLOOD CELLS FOR THE FIRST TIME

DEVELOPED THE FIRST MERCURY BAROMETERIN 1643

CREATED ANOTHER SCALE FOR THE THERMOMETER IN 1742

PROVED GALEN WRONG ABOUT THE HUMAN BODY IN 1543

DISCOVERD THE VACCINE FOR SMALLPOX IN LATE 1700

PIONEERED THE USE OF THE SCIENTIFIC METHOD IN CHEMISTRY IN 1600'S