I... This is Just Awesome

Behold.

We've talked about 3D printing before but this new machine is a first.  The new machine, conceived by Enrico Dini, lays down sand along with an inorganic binder to literally build things out of rock.

The first idea that came to MY mind (and apparently the creator's own) was to use this to pre-fabricate buildings for lunar and Mars colonization.  From what I understand those places have lots of sand.  Hot!