<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>On Nov 25, 2016, at 7:55 AM, spike <<a href="mailto:spike66@att.net">spike66@att.net</a>> wrote:</div><blockquote type="cite"><div><blockquote type="cite"><span>... On Behalf Of Giulio Prisco</span><br></blockquote><span>Subject: Re: [ExI] Directed Evolution Teaches Nature the Unnatural, Brings</span><br><span>Silicon to Life</span><br><span></span><br><blockquote type="cite"><span>...Why shouldn't C-Si lifeforms be intelligent?</span><br></blockquote><span></span><br><span>They might be, eventually. But it might take 3 billion years to get there.</span><br><span>Or there is something like the blue-green algae equilibrium that</span><br><span>carbon-based life was stuck in for a couple billion years, but one that is</span><br><span>even more stable.</span><br></div></blockquote><br><div>Why 3 billion? How do we know that's not more toward the longish end of the range? Couldn't some places be primed for faster evolution to complex and intelligent life?</div><div><br></div><div><div id="AppleMailSignature"><div style="line-height: normal;"><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Regards,</span></div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);"><br></span></div><div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Dan</span></div><div style="line-height: normal;"><span style="background-color: rgba(255, 255, 255, 0);"> Sample my Kindle books via:</span></div><div style="line-height: normal;"><font color="#000000" style="background-color: rgba(255, 255, 255, 0);"><a href="http://author.to/DanUst" style="background-color: rgba(255, 255, 255, 0);">http://author.to/DanUst</a></font></div></div><div><br></div></div><div><div style="line-height: normal;"></div></div></div></div></body></html>