Culture rose in ancient humans as testosterone fell, study says
Modern culture among ancient humans began to rise as levels of testosterone — associated with macho, aggressive behavior — fell, according to a new study conducted by a University of Utah biology graduate student. Robert Cieri and other researchers studied 1,400 ancient and modern human skulls, finding that their characteristics became more feminine as time progressed, indicating lowering testosterone levels. This reduction in testosterone coincided with leaps forward in human ...
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