GRAHAM ALEXANDER is an associate professor at the University of Witwatersrand, where he lectures and supervises postgraduate students. He has authored many scientific papers and popular articles, and his research has been the subject of documentaries on television. Alexander served as editor of the African Journal of Herpetology and associate editor of African Zoology, and has been curator at FitzSimons’ Snake Park and of the herpetology division at the State Museum in Windhoek.