Right— I now remember some conversation surrounding a similar problem on Titan(?). I think a drilling drone was proposed, but communications posed complicated.

Right— I now remember some conversation surrounding a similar problem on Titan(?). I think a drilling drone was proposed, but communications posed complicated. That is, communicating to a base rover to route to Earth. I could picture some kind of high-tensile wire on a spool connected to the digging drone. It might not be the highest speed communication, but if it at least proved reliable, that could work, no?