I was going to mention the Carnot cycle and the different fluids that allow this specific type of heat transfer to take place. But it is mind blowing to see how fluids and phase changes can drastically change ambient temps.

It's funny because I find the Carnot engine pretty intuitive, but when they say refrigeration is just running the process in reverse my brain explodes.

Undisciplined

Yea it is a modern marvel. I often look at youtube videos to get a better understanding how air conditioning works. (Back when I was on youtube)