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This cave hid its own world for 5.5 million years. πŸ•³οΈ
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Creepy DiscoveriesSep 25, 2026

This cave hid its own world for 5.5 million years. πŸ•³οΈ

This cave hid its own world for 5.5 million years. πŸ•³οΈ . . . Discovered near Mangalia, Romania, in 1986, Movile Cave contains air with roughly half the normal oxygen level. Researchers catalogued 48 animal species, including 33 found nowhere else. With no sunlight, its food web runs on bacteria feeding from sulfur and methane.

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Source

BBC Earth, 2015, 'The bizarre beasts living in Romania's poison cave'

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