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...work has more than borne out his theories, explains Peter Skelton...[An ammonite fossil embedded in rock.] We tend to think of Charles Darwin as a kindly-looking old man with a big beard, but let's wind the clock back to the vigorous 22-year old embarking in 1831 on the voyage of a lifetime around the world on the survey ship, HMS Beagle. Recently down from Cambridge, his...

...work of philosophy, marking the birth of the modern animal rights movement – though its author spoke not of rights per se, but, as a utilitarian, in terms, put crudely, of maximising interests or happiness. The Australian author is now at Princeton and arguably the world’s most famous philosopher. He argues that some animals have a higher moral status than some humans...