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Scientists have discovered two tiny new snail species in Montenegro, notable for shells that close like doors, demonstrating that even well-studied parts of Europe still hold undiscovered biodiversity. One species lives in the Komarnica Canyon, an area threatened by a proposed hydropower reservoir project. Researchers warn that construction could destroy the snails' habitat before scientists have a chance to fully understand the canyon's unique biodiversity, raising conservation concerns tied to the region's energy development plans.