Charles Robert Darwin

Charles Darwin (1809-1882) was the English naturalist whose theory of evolution by natural selection fundamentally reshaped our understanding of life. Early in his life, he was considered an academic failure, dropping out of medical school and showing more interest in beetles than books. His life changed during a five-year voyage aboard HMS *Beagle*, where his observations in the Galápagos Islands led him to suspect that species were not fixed creations but populations that changed over time. For twenty years, Darwin meticulously gathered evidence, from breeding pigeons to studying barnacles, while refining his 'secret' theory. He finally published *On the Origin of Species* in 1859, positing that variation, inheritance, and competition allow nature to select for traits that ensure survival. His work replaced the notion of a static creation with a dynamic, interconnected 'tree of life,' establishing the foundational framework for modern biology and ecology.