Abraham Trembley, Swiss biologist and zoologist (died 1784)

Abraham Trembley 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".

September 3 is the 246th day of the year in the Gregorian calendar; 119 days remain until the end of the year.