Expanding iris table

This is a variation on the DB Fletcher Capstan Schwartz expanding table. Nicely done!


DIY civilization starter kit

Martin Jakubowski started the Global Village Construction Set, which aims to create Open Source plans for building the fifty machines they believe are needed to keep a modern village running.

Can you figure out how to make most these machines work in the vacuum of space, with little or no gravity? We’ll need it for our moon base.