The Mysterious Black Goo of Venezuela: La Mancha Negra
Therese R. asks: Is it true that there is a substance seeping up from the ground on a road in Venezuela that no one can identify? First appearing in 1986 on a highway between the city of Caracas and its airport, La Mancha Negra, meaning literally a black stain, began as an approximately 50-yard (46 meter) long smudge, seen by […]
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