3D-printing technologies have surged in the last decade, changing manufacturing forever. Early models were primarily printed using 3D pixels called voxels, which are built up very meticulously ...

But three exhibits, out of them all, stand above: The SR-71 Blackbird, the Concorde, and the Space Shuttle Discovery. Since my childhood trips to Air and Space, I've loved all three of those planes.

During its 140-second trial run, SpaceCAL 3D printed four items from a liquid plastic called PEGDA. These included space shuttle models and small tugboats called "Benchys," conventionally used as ...