Can you look at someone's face and know what they're feeling? Does everyone experience happiness, sadness and anxiety the same way? What are emotions anyway? For the past 25 years, psychology professor Lisa Feldman Barrett has mapped facial expressions, scanned brains and analyzed hundreds of physiology studies to understand what emotions really are. She shares the results of her exhaustive research -- and explains how we may have more control over our emotions than we think.

Lisa Feldman Barrett: You aren't at the mercy of your emotions -- your brain creates them

You aren't at the mercy of your emotions -- your brain creates them

By understanding the brain's role in constructing emotions, we gain control over our emotional experiences and reactions.

Emotions aren't hardwired but constructed by our brains, challenging traditional views and offering control over our feelings.

Predictions, not reactions, shape our emotional life, teaching us that understanding and changing our predictions can alter emotions.