A new study suggests that horses are capable of 17 distinct facial expressions—more than have been identified in chimps, dogs, and cats.
Your Horse's Facial Expression Can Signal He's in Pain
Chimpanzees Remember Things Faster Than You Do, Smart News
Bonobos offer hope that humans can get along (unlike those warring chimps) : Goats and Soda : NPR
What Kind of Emotions Do Animals Feel?
Project Nim': A Chimp's Very Human, Very Sad Life : NPR
Native Americans corralled Spanish horses decades before Europeans
Monkey visual attention does not fall into the uncanny valley
Horse Facts - Animal Facts Encyclopedia
Horse, Definition, Breeds, Pictures, Evolution, & Facts
How Genetically Similar Are Humans To Other Life Forms?
Cowboy Lawyers Association
Animals, Free Full-Text
Surprisingly long-lived wild female chimps go through menopause
First Horse Warriors, NOVA