Kai Kupferschmidt, contributing correspondent for Science magazine, joins us to discuss why we so often overlook the rarity of the color blue and his trek around the globe to better understand it.
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We’ll talk about how access to rare metals may swing the balance of global power in the digital age with the author of “The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age.”
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