In 1986, road crews repairing 30-year-old pavement on the route between Caracas and its airport spotted a 50-yard smudge of greasy black gunk. It looked like chewed bubble gum, made the road slick as ice, and swelled in hot, wet weather, then shrank when things turned cold and dry. — Read the rest The post Caracas has a mysterious black highway goo that has killed 1,800 people appeared first on Boing Boing.

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