<div dir="ltr">Henrique:<div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">> Correct me if I'm wrong but I think I've read somewhere that Earth's water </span><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">comes from comets and asteroids. </span></div>
<div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></span></div><div><font face="arial, sans-serif">Yes, so they say. But for every iron atom in the universe, there is at least one molecule of water. So, a 100 to 1000 km deep ocean is unaccounted for on this planet. The problem is where all the water went. Not from where this water came from.</font></div>
<div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">> And that Jupiter and Saturn attract most of </span><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">the comets and asteroids to themselves. Put the two together and then we end </span><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">up with tiny moon Europa having more than two times the water Earth has.</span><div class="" style="font-family:arial,sans-serif;font-size:12.800000190734863px">
</div></div><div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:12.800000190734863px">Exactly. </span></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Mon, Nov 25, 2013 at 4:23 PM, spike <span dir="ltr"><<a href="mailto:spike66@att.net" target="_blank">spike66@att.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="white" lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal">
<b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">>…</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> <b>On Behalf Of </b>Anders Sandberg<br>
<br></span><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1f497d"><u></u><u></u></span></b></p><p class="MsoNormal"><br><span style="color:#1f497d">>…</span>There are other expanding liquids like beryllium difluoride, but most are elements like silicon, bismuth, antimony, gallium and plutonium<span style="color:#1f497d">…<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Ja. I can’t think of any life forms that depend on that oddball characteristic of water ice. Perhaps the remarkable thing here is that with all the ice on this planet, there are no known (to me) life forms that use it in its solid phase. One would think there would be a snow eater somewhere. Clearly it wouldn’t be to extract energy from the water (ground state compound) but rather some kind of life form that can plant itself in snow and use sunlight.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">>…</span> Even I agree that a planet with plutonium oceans is unlikely to be habitable for life. -- Dr Anders Sandberg<span style="color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I learned a new thing by thinking about this. There is an isotope of plutonium which is non-fissile, 244. Get a sphere of the stuff, heat it to 900 and some Kelvin, you have an ocean of plutonium, with radioactive particles up the kazoo but no fission. Until Anders’ offhanded comment about an ocean of plutonium, I never knew there was such a critter. Ain’t science kewallll? {8-]<span class="HOEnZb"><font color="#888888"><u></u><u></u></font></span></span></p>
<span class="HOEnZb"><font color="#888888"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">spike <u></u><u></u></span></p>
</font></span></div></div><pre><span style="color:#1f497d"><u></u> <u></u></span></pre><pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></pre></div>
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