With some cheap parts and a little electrical magic
you can make yourself a mini fridge
Physics, how we love you. You keep our feet on the ground, ontologically-ambiguous cats locked in boxes and photons in two places at the same time. It also enables the Peltier effect, what’s that we hear you breathlessly ask?
If a current is passed between two different materials a heat differential is created; one side hot the other cold. The principle is used in all sorts of situations including cooling processors and mini-fridges, though apparently they’re not that efficient, just small and light…