Everyone appreciates a good smile. A smile conveys happiness and optimism, and seeing a smile causes our brain to release feel-good reward signals. Humans are the only animals who grin to express happiness, with several species of primates and apes making exceptions. However, scientists from Queen Mary University of London have found that goats appear to comprehend what a … [Read more...] about It Turns Out That Goats Are Drawn to Smiling and Happy Faces and Can Identify Human Emotions