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January 6th, 2010
Interactive: Highlights from the Human Spark

Alan Alda traveled the world, meeting with researchers who helped him narrow in on just what that elusive Human Spark is. What is it that makes us so different from our closest genetic relatives? What do we have that they don’t? Scroll through this interactive feature to learn a bit about some of the evidence Alan examined as well as some of the current debates in the field.

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