Speaking of astronauts, by far the most ambitious of these 3D printed futures is where we set up an entire moon base by printing out the construction blocks to be used to construct the base. Researchers have theorized that in the absence of plastic, we might be able to utilize the abundantly available moon soil to print out building blocks to form a lunar habitat for humans. Researchers at the European Space Agency have been able to create a 1.5 tonne building block make of synthetic lunar soil. The result was a sturdy yet light material that the astronauts can assemble themselves. It should be noted that, so far, these technologies have been tested only on Earth. The real test will occur whenever the ESA decides that it is ready for space launch.