Abraham Trembley, Swiss zoologist and academic (b. 1710)
Abraham Trembley (3 September 1710 – 12 May 1784 Geneva) was a Genevan naturalist. He is best known for being the first to study freshwater polyps or hydra and for being among the first to develop experimental zoology. His mastery of experimental method has led some historians of science to credit him as the "father of biology".He also wrote on religion and morals.

1784May, 12
Abraham Trembley
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Events on 1784
- 14Jan
Ratification Day (United States)
American Revolutionary War: Ratification Day, United States - Congress ratifies the Treaty of Paris with Great Britain. - 23Aug
State of Franklin
Western North Carolina (now eastern Tennessee) declares itself an independent state under the name of Franklin; it is not accepted into the United States, and only lasts for four years. - 22Oct
Kodiak Island
Russia founds a colony on Kodiak Island, Alaska.