With a long grey beard and old-school brown suit, a Charles Darwin lookalike observes marine iguanas and the blue-footed booby - an iconic bird on the Galapagos Islands. Two centuries after the British biologist visited the archipelago which inspired his theory of evolution, retired US professor Kenneth Noll, 66, has tracked part of his journey all while dressed as his 19th-century hero. IMAGES AND SOUNDBITES