Keith Harrison has a PhD in zoology from the University of Nottingham. He is a former Senior Scientific Officer at the Natural History Museum in London and a former programme manager for the UK's Natural Environment Research Council. A Fellow of the Institute of Biology, the Geological Society of London and the Linnean Society of London, Keith's fieldwork has taken him to East Africa and South America, and he has published numerous scientific articles about invertebrate and vertebrate animals. He wrote 1,000 entries on mammals, birds, reptiles and amphibians in Cambridge University Press's household reference The Cambridge Encyclopedia. He now works in the media.