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Episodes
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#3860: Qatar's Gift Plane: Air Force One Security Risk?A foreign government gave the U.S. a Boeing 747 for Air Force One. Is it a generous gift or a security nightmare? -
#3249: Why Gold, Silver, and Bronze? The 5,000-Year-Old Metal Hierarchy ExplainedGold, silver, bronze—why this exact ranking? Chemistry, the sun, and a mountain of silver in Bolivia.