40 Strange Cave Discoveries That Are Hard To Be Explained

 The Poisonous Caves Of Romania: Part 3

Sunlight has never found its way down here so the inhabitants have adapted to an ecosystem that functions without the sunrays. Imagine how difficult it would for us down there? The bacterias in here, break down chemicals in the air to get their carbon dioxide and survive.

In these depths, it is impossible for human beings to survive but the explorations carry on and who knows what we might find buried deep in these caves.