<div dir="ltr">On Wed, Nov 13, 2013 at 2:17 PM, Kelly Anderson <span dir="ltr"><<a href="mailto:kellycoinguy@gmail.com" target="_blank">kellycoinguy@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>> While fire is important to land animals, what makes it important is that it is terrestrial. [...] mining would be terribly difficult underwater, and especially in the
very deep water worlds. How would they be able to pass through the
bronze and iron ages in such a world?</div></div></div></div></blockquote><div><br></div><div>Even if the underwater creatures could obtain copper and tin ore it would do them no good if they didn't have fire and the necessary heat to refine the ore into bronze. And making iron tools requires even more heat than bronze, and steel more than iron. <br>
<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">
<div>> Imagine that cephalopods had another billion years of evolution without the interference of land returning to water animals</div></div></div></div></blockquote><div><br></div><div>But they don't have another billion years, the sun will leave the main sequence and the Earth will become uninhabitable in about half that time, <br>
<br></div><div> John K Clark<br></div><br></div></div></div>