The deepest artificial point on Earth #1 Post by technel » Fri, Jun 13, 2014, 1:06 AM UTC The deepest artificial point on Earthen.wikipedia.org
Re: The deepest artificial point on Earth #2 Post by dang » Fri, Jun 13, 2014, 2:28 AM UTC https://hn.algolia.com/?q=borehole#!/story/forever/0/borehol...