There are heat pipes in most laptops these days, carrying heat from your CPU to the edge of your computer. A heat pipe looks like a ~1/4" copper tube, maybe somewhat flattened, and it's usually attached to a solid block at one end (which sits on the heat source) and has fins on the other end to radiate the heat. A heat pipe can conduct more heat than a piece of solid copper of the same size - but how? Copper has the second-highest thermal conductivity of any metal!
There are variations - vapor chambers for heat spreading, Variable Conductance Heat Pipes, etc. These things are like magic, I'm just amazed that they work.