Thomas Huxley (1825-1895) was an English biologist and anthropologist known for his strong advocacy of Charles Darwin's theory of evolution. Often referred to as "Darwin's Bulldog," Huxley played a crucial role in promoting the idea of natural selection and its implications for human origins. Huxley made significant contributions to various fields, including comparative anatomy and paleontology. He was instrumental in establishing the Natural History Museum in London and served as a member of Parliament. His work laid the foundation for modern biology and helped shape public understanding of science during the Victorian era.