If he had a passport Charles Robert Darwin might have been described as a naturalist but he was one of the greatest of scientists, a titan among biologists. His theory of evolution by natural selection unified science, providing a coherent explanation for how the diversity of life came to be.
Adam Sedgwick was one of the most respected geologists in England in the nineteenth century. He identified the Devonian and Cambrian geological periods.
Richard Owen was a gifted biologist, comparative anatomist and palaeontologist. Today he is best known for coining the word ‘dinosaur’ but his contribution to science deserves much wider recognition.