Mama's last hug: animal emotions and what they tell us about ourselves

Mama's last hug: An ape matriarch's farewell

Window to the soul: When primates laugh and smile

Body to body: Empathy and sympathy

Emotions that make us human: Disgust, shame, guilt, and other discomforts

Will to power: Politics, murder, warfare

Emotional intelligence: On fairness and free will

Sentience: What animals feel.