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Re: OFF: Re: Civilization without fire

From:Patrick Dunn <tb0pwd1@...>
Date:Tuesday, January 4, 2000, 17:18
On Tue, 4 Jan 2000, + + wrote:

> Fire is not needed for smelting. All you need is heat, and as I think > abrigon has pointed out, there are other chemical processes (our good > friend calcium springs immediately to mind) that can produce intense > heat in a wet environment. Those famous undersea vents (and other hot > springs) provide a nifty amount of heat. Heck if insects can mix > highly volatile (ie reactive, ie hot) concoctions and squirt them into > their environs, I don't see why cephalopods can't! :-)
How does calcium produce heat? What's the reaction like? How intense is the heat? Sorry for being so inquisitive; just storing this for a possible future short story or book. --Pat