szczys writes: Making change for $1.00 and getting $1.10 back. That's the premise of overunity, free energy, and perpetual motion experiments. Using money as the the analogy is fitting because these concepts are heavily aligned with scams trying to land a payday for their "research". But there is another branch of people working on them: tinkerers who believe they can actually solve the problem. Laws of thermodynamics say otherwise, but this isn't necessarily wasted time. Other breakthroughs are waiting to be discovered as these mad scientists try to remove all efficiency losses from their doomed systems. YouTube can be an interesting place to look for ideas on low-friction, high efficiency fabrication.