""The reaction to angry facial expressions was
particularly clear – there was a quicker increase in
their heart rate, and the horses moved their heads to
look at the angry faces with their left eye."
..."
https://www.theguardian.com/science/2016/feb/10/horses-can-recognise-human-emotion-new-study-shows
above pic by me taken at san diego zoo , the polar bear loves playing with a football
