Underwater Civilization Idea

So, I saw the FAQ, and the part about underwater civilization.

What I realized was this:

Even under-water, a civilisation could still do metal working, just using geothermal vents. So, maybe a new property: heat. A civilization could use any source of heat. Typicly fire, yes, but geothermal, mirros (Sunlight), and so on

Just a thought!

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3 posts were merged into an existing topic: Underwater Civilizations Take 3