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He explained the ways of the circulatory system and how the blood flows through your body.
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He was the first to observe living bacteria.
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Came up with a smallpox vaccine.
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He published “An Essay of Population” which explained that someday the population would exceed the resources.
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He published On the Origin of Species that showed species of life have descended over time.
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Her nursing theory was published.
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He came up with a process known as pasteurization.
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He did an experiment on plant hybridization and came up with Laws of Inheritance.
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He used carbolic acid to wash his hands and sprayed it in the air to kill airborne germs.
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Proves Bacillus anthracis causes anthrax.
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Studied red blood cells and discovered the precursors of erythrocytes.
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She founded the American Red Cross
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Found that a mould culture prevented growth of staphylococci and named the substance penicillin.
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He created the first antibiotic drug.
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He became director of the first American Red Cross Blood Bank.
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He observed that adenine equals thymine and cytosine equals guanine.
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He concluded that DNA is the heredity molecule in viruses.
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He put together a model for the structure of DNA.
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Developed an oral vaccine for polio.
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Came up with a vaccine for polio.
