Watch these recommended TED-Ed Lessons and TED Talks:

Are there universal expressions of emotion?
The 40 or so muscles in the human face can be activated in different combinations to create thousands of expressions. But do these expressions look the same and communicate the same meaning around the world regardless of culture? Is one person’s smile another’s grimace? Sophie Zadeh investigates.

Can machines read your emotions?
Computers can beat us in board games, transcribe speech, and instantly identify almost any object. But will future robots go further by learning to figure out what we’re feeling? Kostas Karpouzis imagines a future where machines and the people who run them can accurately read our emotional states — and explains how that could allow them to assist us, or manipulate us, at unprecedented scales.

Should emotions be taught in schools?
Who taught you how to identify and manage your emotions, how to recognize them when they arose, and how to navigate your way through them? For many adults, the answer is: No one. You hacked your way through those confusing thickets on your own. Although navigating our inner landscape was not something that was taught to us in school, it should be, contend a number of researchers.

The gift and power of emotional courage
Psychologist Susan David shares how the way we deal with our emotions shapes everything that matters: our actions, careers, relationships, health and happiness. In this deeply moving, humorous and potentially life-changing talk, she challenges a culture that prizes positivity over emotional truth and discusses the powerful strategies of emotional agility.

Your words may predict your future mental health
Can the way you speak and write today predict your future mental state, even the onset of psychosis? In this fascinating talk, neuroscientist Mariano Sigman reflects on ancient Greece and the origins of introspection to investigate how our words hint at our inner lives and details a word-mapping algorithm that could predict the development of schizophrenia.

The history of human emotions
The words we use to describe our emotions affect how we feel, says historian Tiffany Watt Smith, and they've often changed (sometimes very dramatically) in response to new cultural expectations and ideas. In this fascinating talk about the history of emotions, learn more about how the language we use to describe how we feel continues to evolve -- and pick up some new words used in different cultures to capture those fleeting feelings in words.

Can you really tell if a kid is lying?
Are children poor liars? Do you think you can easily detect their lies? Developmental researcher Kang Lee studies what happens physiologically to children when they lie. They do it a lot, starting as young as two years old, and they're actually really good at it. Lee explains why we should celebrate when kids start to lie and presents new lie-detection technology that could someday reveal our hidden emotions.

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