Who built the first practical vapor compression refrigeration system?
Correct answer: James Harrison

Destino Manifesto
I remembered the Harrison name from reading about the invention of the first really practical "ice box", or refrigerator, somewhere in my library visits in my younger days. 😌

Rick-N-Bacher
Destino Manifesto, my grandfather always called the fridge the ice box. I never knew why until he told me when he was young they actually had a box that held a block of ice

MightyDervish4600
50/50 still got it wrong

DerParia
had no idea, took a guess