Annie Murphy Paul: What We Learn Before We're Born
Pop quiz: When does learning begin? Answer: Before we are born. Science writer Annie Murphy Paul talks through new research that shows how much we learn in the womb -- from the lilt of our native language to our soon-to-be-favorite foods.
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Defying Gravity
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Janet Echelman: Taking Imagination Seriously
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Optical Illusion: Perspective is Everything
Definition of "illusion": something that deceives by producing a false or misleading impression of reality.