Reading Time: 2 minutesContact Information Available for logged-in reporters only Newswise SALT LAKE CITY, Aug. 1, 2014 A study of 1,400 ancient and modern human skulls suggests that a reduction in testosterone hormone levels accompanied the development of cooperation, complex communication and modern culture some 50,000 years ago. The research, published in todays issue of the journal Current Anthropology, uses craniofacial evidence to propose that lowered testosterone levels could explain the relatively sudden origin of modern behavior about 50,000 years ago, says University of Utah biology graduate student Robert Cieri. Cieri conducted the study of the feminization of human skulls and faces with … Read more
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