View full lesson: ed.ted.com/lessons/what-is-love-brad-troeger Is love a signal winding through your neural pathways? A cliche? A cult? Love is easy to compare but difficult to define, maybe because we're fundamentally biased; we try to define love while falling in or out of it. And love feels differently to every person who feels it, but this subjective emotion has evolutionary explanations, too. Brad Troeger takes a shot at the definition of love. Lesson by Brad Troeger, animation by STK Films.

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