ELI5: Why do freezers in refrigerators go to negative temperatures? Isn't frozen frozen? Why not stop at 20 degrees? explainlikeimfive

We're not talking about deep freeze cycles or maintaining embryos, just ice cubes and frozen food.

Submitted July 24, 2017 at 10:51PM by reddit_or_idiot http://ift.tt/2tv8fYk explainlikeimfive