THE USS Enterprise they are not. One looks like a magic-marker pen, except that it is 58km long. The second, a pair of conjoined Ferris wheels. And the third, a giant jellyfish. They are, nevertheless ...

Marcin Jakubowski is compiling a DIY set of society’s essential machines and making it open-source. You live in a house you designed and built yourself. You rely on the sun for power, heat your home ...