Adrian Bejan is a very smart man who knows a lot about thermodynamics. That's a big word that means how heat and energy move around. He's figured out some really cool things about how things like water and air move through different objects, like pipes or cars.
He has what he calls the "constructal law". This says that all things in nature (like living things and non-living things) are always trying to find the easiest and most efficient way to move and flow. Kind of like how water always flows downhill because that's the easiest way for it to move.
Adrian has been studying and discovering things about thermal sciences for a long time, and he's even won some really big awards and published lots of books about his ideas!