Overunity doesn’t exist if you mean making energy from nothing. But let’s admit, though it’s difficult to tap, excess energy exists out there. Stars burn, moons turn, comets and other debris fly by. Gravity crushes gases into metal. Even empty space is alive with energy. Here’s what we do. We put a tiny wormhole in a box and generate electricity from radiation streaming across the fabric of space. Our box makes energy from something, not nothing, and we spend little to convert and control it. All set, it’s a positive net.