22. Hot Water Can Freeze Faster Than Cold Water Under the Right Conditions
You’ve always assumed cold water freezes quicker because it’s already closer to freezing point, but the Mpemba effect proves otherwise: under certain conditions (like specific container shapes and temperatures), hot water can actually freeze faster than cold. It has to do with evaporation, convection currents, and dissolved gases escaping more quickly from warmer water.
This counterintuitive physics fact has confused scientists and home cooks for decades. People over 35 who’ve made ice cubes or frozen leftovers hundreds of times now question every tray they’ve ever filled. It’s the kind of obvious-yet-shocking science that makes you want to run to the freezer and test it tonight.
