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Co-author Shinya Yamamoto, an associate professor of primatology at Kyoto University, told Salon that this finding is significant because it is the first to ever study contagious urination in any animal, including humans.

He further adds "These findings could expand the potential applications of such techniques in studies of animal psychology and wild primatology."

As Junger writes about the meanings of freedom and community, he occasionally swerves into boxing strategy, labor history and primatology.

“It seemed like it all could sort of fit together, in this cool way, this primatology data to actually test this idea about human cognition,” she says.

In an accessible and enlightening style, she takes us with her on her journeys to primatology research sites in Puerto Rico and Kenya, and to cutting-edge biology and neuroscience laboratories in the United States.