Contributor biographical information for Sex at dawn : the prehistoric origins of modern sexuality / Christopher Ryan and Cacilda Jetha.


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Christopher Ryan, PhD, is a research psychologist. He lives in Barcelona, Spain.


Library of Congress subject headings for this publication:
Sex.
Sex -- History.
Sex customs.
Marriage.
Monogamous relationships.
Primates -- Sexual behavior.
Sexual behavior in animals.
Social evolution.
Human evolution.