RT @brainpicker: Study finds yawns are contagious only between people who care about one another: bit.ly/tjDUgl
— Craig Shapiro (@cshapiro) December 8, 2011
RT @brainpicker: Study finds yawns are contagious only between people who care about one another: bit.ly/tjDUgl
— Craig Shapiro (@cshapiro) December 8, 2011
