Scientists unearth world's oldest mushroom fossil. The 115-million-year-old fossil was discovered in the limestone in Brazil. The mineralized mushroom hails from a time when all of the world's continents formed a single piece of land called Pangea.

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Scientists unearth world's oldest mushroom fossil. The 115-million-year-old fossil was discovered in the limestone in Brazil. The mineralized mushroom hails from a time when all of the world's continents formed a single piece of land called Pangea.