Thomas Henry Huxley (1825 - 1895) was a biologist and an early supporter of Charles Darwin's work. He did such notable work as studying marine invertebrates and dissecting apes; he showed that ape anatomy is very close to human anatomy. When he learned of Charles Darwin's theory of natural selection, he supposedly commented "How stupid of me not to have thought of that!", and became a strong supporter of Darwin's work, becoming known as "Darwin's bulldog".
The word "agnostic" was his invention for describing his beliefs about religion.