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This paper extends the evolutionary understanding of sex differences in mortality rates by quantifying and graphically examining the overall Male to Female Mortality Ratio (M:F MR) for 11 specific leading causes of death across age groups in the USA, over the course of the lifespan in 20...
We examine some of the implications of the possibility that the human penis may have evolved to compete with sperm from other males by displacing rival semen from the cervical end of the vagina prior to ejaculation. The semen displacement hypothesis integrates considerable information about...
In a recent series of articles, Hislope (1998, 2000) and Harvey (2000a, 2000b) have raised questions about the usefulness of “evolutionary theory” especially for any purpose other than identifying “distal” causes of ethnic phenomena. This article responds to those views and argues that...
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