2022/2/23 What happens in the freezer? I grew up thinking that frozen things never changed. The mashed potatoes on the back of the shelf would last forever. I found out eventually that that isn't the case. But why? Water still evaporates when it is frozen, sublimating up and out of food, but then it refreezes in the cold air. Lots of other things change too, for various reasons but the cincher is the freezer not really being frozen all the time. When you open the door it lets out the cold and in the warm air. The more stuff and less air in your freezer the better. Packing it full of crumpled newspaper can help with this. Having a chest freezer that opens at the top is even better.