Thomas Huxley. Coloured portrait of the British biologist Thomas Henry Huxley (1825-95). Huxley was the main advocate for the theory of evolution in scientific debates because Charles Darwin, its co-proposer, was a shy man who shunned publicity. One of the most famous debates on Darwin's theory in which he took part occurred at a meeting of the British Association for the Advancement of Science in Oxford in 1860. Huxley's research on primates firmly established man in this biological order, providing further scientific evidence for evolution. Huxley also did work in palaeontology and zoology. This artwork was taken from A Modern Portrait Gallery, volume 3 (1881).