Hot Water Can Freeze Faster Than Cold Water, And Scientists Still Argue About Why
It sounds like a trick question, but under the right conditions the boiling stuff wins the race to ice.
Set two cups in the freezer, one hot and one cold, and common sense says cold freezes first. Common sense loses this one often enough that it has its own name in science.
Under certain conditions, the hotter water beats the colder water to solid ice. It's a real, repeatable effect that has puzzled curious people for a very long time.
The suspected reasons are a whole grab bag. Hot water evaporates a little, so there's less to freeze. It may also shed heat faster and stir itself with convection currents as it cools.
What makes it so fun is that there's still no single clean answer everyone agrees on. It's one of those everyday mysteries hiding in your kitchen freezer, waiting for you to test it.
