Last time we talked about a video that purported to do plastic welding, we mentioned that the ... metal reinforcement from things like wires and staples, and donor plastic from a zip tie.

It looks like they raise the cutter head upwards to make the welding passes, probably spreading the beam out a bit. Do they also run it at lower power, or slower? We demand details! Anyway ...

Instead of relying on fasteners to keep structures together in space, astronauts may need to use lasers to weld on the lunar surface.