So people built a large Peltier element that radiates a bit of heat on one side and powers a LED. That's a cool experiment, but comparing it to solar power and

So people built a large Peltier element that radiates a bit of heat on one side and powers a LED. That's a cool experiment, but comparing it to solar power and saying "it literally is generating visible light out of the darkness of the sky" goes a bit far imho. The headline implies energy out of nothing, while in truth it's more like "small thermoelectric experiments also work without a candle".