<div dir="ltr"><div dir="ltr">On Wed, Jun 17, 2020 at 5:59 AM John Clark via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><div class="gmail_quote"><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 dir="ltr"><div style="font-family:arial,helvetica,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif">On Wed, Jun 17, 2020 at 2:14 AM Giulio Prisco via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org" target="_blank">extropy-chat@lists.extropy.org</a>> wrote:</span><br></div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><i><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">> </span>John, I am not talking of "a totally self-sufficient colony" on the<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </span>Moon or Mars,<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </span>not yet. I am perfectly OK with letting these things<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </span>take the time they must take.</i></blockquote><div><br></div><font size="4">I am perfectly OK with waiting until the time is right, that is to say until we have the technology to make a extraterrestrial colony self-sufficient. People seriously interested in human space colonization should be pushing for a proof of concept, a self-sufficient colony in Antarctica would be a great prototype.</font></div></div></blockquote><div><br></div><div>How about a self-sufficient and enclosed colony in Arizona?</div><div><a href="https://en.wikipedia.org/wiki/Biosphere_2">https://en.wikipedia.org/wiki/Biosphere_2</a> </div></div></div>