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Concrete is such a fundamental aspect of humanity that we barely even notice it anymore. It's literally pedestrian. This episode we find out why and how concrete came to be, and how it formed the modern world we live in. Also: "King of Kong" winner controversy, the sound of black holes colliding, the rapture is upon us, Wapato Jail sold, "Pirates of the Caribbean" ships on Oregon coast, Art Bell dies, Japan's robot mayor, world's most hipster cities, throw out your romaine lettuce, and the world is in the grips of a Necco Wafer panic! Enjoy!