European Space Agnecy wants a 3D printed building on the moon

Moonbase

The European Space Agency wants to 3-D print a moon base.  But one of the biggest challenges would be the expense (in terms of energy) to get supplies off of Earth.  One way is to send as little as possible to the Moon.  Couldn’t we just make a moon base out of rock?  After all, the moon is already made of rocks. (Pics)

 

 

 

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