Ruspoli, Lascaux: the Final Photographs (Abrams, New York, 1987); and Paul G. Bahn and Jean Vertut, Images of the Ice Age (Facts on File, New York, 1988). Matthew H. Nitecki and Doris V. Nitecki, The Evolution of Human Hunting (Plenum Press, New York, 1986), providea series of chapters by various authors on that subject. The question of whether Neanderthals really did bury their dead is debated in an article by R.H. Gargett, 'Grave shortcomings: the evidence for Neanderthal burial', and in accompanying responses, published in Current Anthropology 30, pp. 157-90 (1989). Three sources that will provide an entrance into the literature on the "nked questions of human vocal tract anatomy and whether Neanderthals could speak are Philip Lieberman's The Biology and Evolution of language (Harvard University Press, Cambridge, 1984); E.S. Crelin's The Human Vocal Tract (Vantage Press, New York, 1987); and an article by Arensburg et al, 'A Middle Palaeolithic human hyoid bone', Nature -338, 758-60 (1989).

Chapter 3: The Evolution of Human Sexuality Chapter 4: The Science of Adultery For anyone interested in an evolutionary approach to behaviour in general (including reproductive behaviour), two books are a must: E.O. Wilson, Sociobiology (Harvard University Press, Cambridge, 1975), and John Alcock, Animal Behavior, 4th edition (Sinauer, Sunderland, 1989).

Outstanding books that discuss the evolution of sexual behaviour include Donald Symons, The Evolution of Human Sexuality (Oxford University Press, Oxford, 1979); R.D. Alexander, Darwinism and Human Affairs (University of Washington Press, Seattle, 1979); Napoleon A. Chagnon and William Irons, Evolutionary Biology and Human Social Behavior (Duxbury Press, North Scituate, Massachusetts, 1979); Tim Halliday, Sexual Strategies (University of Chicago Press, Chicago, 1980); Glenn Hausfater and Sarah Hrdy, Infanticide (Aldine, Hawthorne, New York, 1980); Sarah Hrdy, The Woman that Never Evolved (Harvard University Press, Cambridge, 1981); Nancy Tanner, On Becoming Human (Cambridge University Press, New York, 1981); Frances Dahlberg, Woman the Gatherer (Yale University Press, New Haven, 1981); Martin Daly and Margo Wilson, Sex, Evolution, and Behavior (Willard Grant Press, Boston, 1983); Bettyann Kevles, Females of the Species (Harvard University Press, Cambridge, 1986); and Hanny Lightfoot-Klein, Prisoners of Ritual: an Odyssey into Female Genital Circumcision in Africa (Harrington Park Press, Binghamton, 1989).

Books dealing specifically with primate reproductive biology include C.E. Graham, Reproductive Biology of the Great Apes (Academic Press, New York, 1981); B.B. Smuts et al, Primate Societies (University of Chicago Press, Chicago, 1986); Jane Goodall, The Chimpanzees of Gombe (Harvard University Press, Cambridge, 1986); Toshisada Nishida, The Chimpanzees of the Mahale Mountains, Sexual and Life History Strategies (University of Tokyo Press, 1990); and Takayoshi Kano, The Last Ape: Pygmy Chimpanzee Behavior and Ecology (Stanford University Press, Stanford, 1991).

Articles on the evolution of sexual physiology and behaviour include the following: R.V. Short, 'The evolution of human reproduction', Proceedings of the Royal Society (London), series B 195, pp. 3-24 (1976); R.V. Short, 'Sexual selection and its component parts, somatic and genetical selection, as illustrated by man and the great apes', Advances in the Study of Behavior 9, pp. 131-58 (1979); N. Burley, 'The evolution of concealed ovulation', American Naturalist 114, pp. 835-58 (1979); A.H. Harcourt et al, 'Testis weight, body weight, and breeding system in primates', Nature 293, pp. 55–57 (1981); R.D. Martin and R.M. May, 'Outward signs of breeding', Nature 293, pp. 7–9 (1981); M. Daly and M.I. Wilson, 'Whom are newborn babies said to resemble? , Ethology and Sociobiology 3, pp. 69–78 (1982); M. Daly, M. Wilson, and SJ. Weghorst, 'Male sexual jealousy', Ethology and Sociobiology 3, 11–27 (1982); A.F. Dixson, 'Observations on the evolution and behavioral significance of "sexual skin" in female primates', Advances in the Study of Behavior 13, pp. 63-106 (1983); S.J. Andelman, 'Evolution of concealed ovulation in vervet monkeys (Cercopithecus aethiops) , American Naturalist 129, pp. 785-99 (1987); and P.H. Harvey and R.M. May, 'Out for the sperm count', Nature 337, pp. 508-9 (1989). Chapter Four discussed several examples illustrating how birds combine extramarital sex with apparent monogamy. Detailed examples of such studies are presented in papers by D.W. Mock, 'Display repertoire shifts and extra-marital courtship in herons', Behaviour 69, pp. 57–71 (1979); P. Mineau and F. Cooke, 'Rape in the lesser snow goose', Behaviour 70, pp. 280-91 (1979); D.F. Werschel, 'Nesting ecology of the Little Blue Heron: promiscuous behavior', Condor 84, pp. 381-84 (1982); M.A. Fitch and G.W. Shuart, 'Requirements for a mixed reproductive strategy in avian species', American Naturalist 124, pp. 116-26 (1984); and R. Alatalo et al, 'Extra-pair copulations and mate guarding in the polyterritorial pied flycatcher, Ficedula hypoleuca', Behaviour 101, pp. 139-55 (1987). Chapter 5: How We Pick Our Mates and Sex Partners Not surprisingly, this topic has called forth much scientific study. Some papers exemplifying the literature on mate choice by humans are E. Walster et al, 'Importance of physical attractiveness in dating behavior', Journal of Personality and Social Psychology 4, pp. 508-16 (1966); J.N. Spuhler, 'Assortative mating with respect to physical characteristics', Eugenics Quarterly 15, pp. 128-40 (1968); E. Berscheid and K. Dion, 'Physical attractiveness and dating choice: a test of the matching hypothesis', Journal of Experimental Social Psychology 7, 173-89 (1971); S.G. Vandenberg, 'Assortative mating, or who marries whom? , Behavior Genetics 2, pp. 127-57 (1972); G.E. DeYoung and B. Fleischer,

Motivational and personality trait relationships in mate selection', Behavior Genetics 6, pp. 1–6 (1976); E. Crognier, 'Assortative mating for physical features in an African population from Chad', Journal of Human Evolution 6, pp. 105–114 (1977); P.N. Bender and M.D. Newcomb, Longitudinal study of marital success and failure', Journal of Consulting and Clinical Psychology 46, pp. 1053-70 (1978); R.C. Johnson etal, 'Secular change in degree of assortative mating for ability? , Behavior Genetics 10, PP- 1–8 (1980); W.E. Nance et al, 'A model for the analysis of mate selection in the marriages of twins', Acta Geneticae Medicae Gemellologiae 29, pp. 91-101 (1980); D. Thiessen and B. Gregg, 'Human assortative mating and genetic equilibrium: an evolutionary perspective', Ethology and Sociobiology 1, pp. 111—40 (1980); D.M. Buss, 'Human mate selection', American Scientist 73, pp. 47–51 (1985); A.C. Heath and L.J. Eaves, 'Resolving the effects of phenotype and social background on mate selection', Behavior Genetics 15, pp. 75–90 (1985); and A.C. Heath et al, 'No decline in assortative mating for educational level', Behavior Genetics 15, pp. 349-69 (1985). Also relevant is a book by B.I. Murstein, Who Will Marry Whom? Theories and Research in Marital Choice (Springer, New York, 1976). The literature on mate choice by animals is at least as extensive as that for humans. A good starting point is a book edited by Patrick Bateson, Mate Choice (Cambridge University Press, Cambridge, 1983). Bateson's own studies on Japanese quail are summarized in Chapter Eleven of that book, and also in his papers 'Sexual imprinting and optimal outbreeding', Nature 273, pp. 659-60 (1978) and 'Preferences for cousins in Japanese quail', Nature 295, pp. 236-37 (1982). Studies of mice and rats that grow up to prefer the perfumes of their mothers or fathers are described by T.J. Pillion and E.M. Blass, 'Infantile experience with suckling odors determines adult sexual behavior in male rats', Science 231, pp. 729-31 (1986), and by B. D'Udine and E. Alleva, 'Early experience and sexual preferences in rodents', pp. 311-27 in the book cited above by Patrick Bateson.