(1638) Danish scientist Nicolas Steno is born. He is known for studying the hearts of cows and determining that they were just regular muscles, not centres for warmth as previously speculated.
(1922) Insulin is used for the first time to treat diabetes in a human patient.
(1964) The Surgeon General of the United States publishes the report ‘Smoking and Health: Report of the Advisory Committee to the Surgeon General of the United States’, which states smoking may be hazardous to health.
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