New Scientist: Imagine two people standing at the South Pole, one dressed in full Antarctic gear and the other wearing not much at all. Now imagine that you’re looking through one of those infrared thermal imagers that show how hot things are. Which person will look warmest – and which will be frozen solid after a few hours? The answer, of course, is that the near-naked person will appear hotter: but because they are losing heat fast, they will freeze long before the person dressed more …