Born on August 1

French naturalist and zoologist (1744–1829), Lamarck developed a theory of evolution based on the adaptation of organisms to their environment and the inheritance of acquired characteristics. A professor at the Paris Museum of Natural History, he laid the foundations of transformism, a precursory vision of evolution predating Darwin.

An American army officer and explorer, William Clark co-led the Corps of Discovery expedition (1804–1806) with Meriwether Lewis, commissioned by President Jefferson. The expedition crossed North America to the Pacific Ocean, paving the way for the settlement of the American West.

America's first professional female astronomer, Maria Mitchell discovered a comet in 1847, earning her a gold medal from the King of Denmark. She was the first woman elected to the American Academy of Arts and Sciences and advocated for the scientific education of women.

Herman Melville (1819-1891) was an American novelist, short-story writer, and poet. Author of Moby-Dick, a masterpiece of world literature, he drew on his experience as a sailor to explore obsession, evil, and the human condition.

French socialist politician (1888–1941), Minister of the Interior in Léon Blum's government under the Popular Front. He was assassinated by the Cagoule, a clandestine fascist organization.

An Australian activist for Indigenous peoples' rights, Lowitja O'Donoghue was the first Aboriginal woman to lead ATSIC (the Aboriginal and Torres Strait Islander Commission). A trained nurse, she dedicated her life to defending civil rights and promoting reconciliation between Indigenous and non-Indigenous Australians.