<div dir="ltr"><div dir="ltr">On Tue, Aug 11, 2020 at 8:58 AM Anton Sherwood 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">On 2020-8-10 19:25, Rafal Smigrodzki via extropy-chat wrote:<br>
> Giant lunar lava tubes might offer hundreds of square miles of protected <br>
> space to build cities supported by high-efficiency farming.<br>
<br>
Has anyone seen lava tubes on the Moon?<br></blockquote><div><br></div><div>Yes. I haven't been there myself to verify this yet, but there are many reports of lava tubes on the Moon. See for instance <a href="https://www.universetoday.com/wp-content/uploads/2015/03/Rima_Ariadaeus-1-e1427740341834.jpg">https://www.universetoday.com/wp-content/uploads/2015/03/Rima_Ariadaeus-1-e1427740341834.jpg</a> . </div></div></div>